Manually merged MainView

MVPLearning/BaseLibrary/BaseButton.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MVPLearning.BaseLibrary
+{
+    public class BaseButton : Button
+    {
+    }
+}

MVPLearning/BaseLibrary/BaseDateTimePicker.cs

@@ -18,7 +18,7 @@ namespace MVPLearning.BaseLibrary
         }
         public void Bind(object datasource, string dataproperty)
         {
-            var oldBinding = this.DataBindings[nameof(BoundValue)];
+            var oldBinding = DataBindings[nameof(BoundValue)];
             if (oldBinding != null) { DataBindings.Remove(oldBinding); }
 
             var newBinding = new Binding(nameof(BoundValue), datasource, dataproperty, true);
@@ -50,23 +50,11 @@ namespace MVPLearning.BaseLibrary
         }
         protected override void OnValueChanged(EventArgs eventargs)
         {
-            System.Diagnostics.Debug.WriteLine("OnValueChanged");
             base.OnValueChanged(eventargs);
             BoundValue = Value;
             Format = DateTimePickerFormat.Custom;
             CustomFormat = Checked ? "MM/dd/yyyy" : " ";
         }
-        protected override void OnValidated(EventArgs e)
-        {
-            base.OnValidated(e);
-        }
-        protected override void OnValidating(CancelEventArgs e)
-        {
-            base.OnValidating(e);
-            System.Diagnostics.Debug.WriteLine("OnValidating");
-            System.Diagnostics.Debug.WriteLine($"Value: {Value}");
-            System.Diagnostics.Debug.WriteLine($"BoundValue: {BoundValue}");
-        }
 
     }
 }

MVPLearning/BaseLibrary/BaseForm.cs

@@ -1,12 +1,30 @@
 using System;
 using System.Collections.Generic;
+using System.ComponentModel;
 using System.Linq;
+using System.Runtime.CompilerServices;
 using System.Text;
 using System.Threading.Tasks;
 
 namespace MVPLearning.BaseLibrary
 {
-    public class BaseForm : Form
+    public class BaseForm : Form, INotifyPropertyChanged
     {
+        public event PropertyChangedEventHandler? PropertyChanged;
+        protected virtual void RaisePropertyChanged([CallerMemberName] string propertyName = "")
+        {
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+
+        protected virtual bool SetProperty<T>(ref T storage, T value, [CallerMemberName] string propertyName = "")
+        {
+            if (EqualityComparer<T>.Default.Equals(storage, value))
+            {
+                return false;
+            }
+            storage = value;
+            RaisePropertyChanged(propertyName);
+            return true;
+        }
     }
 }

MVPLearning/BaseLibrary/BaseForm.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

MVPLearning/BaseLibrary/BaseLabel.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MVPLearning.BaseLibrary
+{
+    public class BaseLabel : Label
+    {
+    }
+}

MVPLearning/BaseLibrary/BaseTextBox.cs

@@ -17,7 +17,7 @@ namespace MVPLearning.BaseLibrary
             var oldBinding = DataBindings[nameof(Text)];
             if (oldBinding != null) { DataBindings.Remove(oldBinding); }
 
-            var newBinding = new Binding(nameof(Text), datasource, dataproperty, false);
+            var newBinding = new Binding(nameof(Text), datasource, dataproperty, false, DataSourceUpdateMode.OnPropertyChanged);
             DataBindings.Add(newBinding);
         }
 

MVPLearning/MainView.Designer.cs

@@ -34,15 +34,20 @@
             recordKeepingToolStripMenuItem = new ToolStripMenuItem();
             sermonFilerToolStripMenuItem = new ToolStripMenuItem();
             maintainSermonFilerToolStripMenuItem = new ToolStripMenuItem();
+            testAreaToolStripMenuItem = new ToolStripMenuItem();
+            bindToModelToolStripMenuItem = new ToolStripMenuItem();
+            bindToViewToolStripMenuItem = new ToolStripMenuItem();
+            bindToViewWithEqualityToolStripMenuItem = new ToolStripMenuItem();
+            validateModelToolStripMenuItem = new ToolStripMenuItem();
             menuStrip1.SuspendLayout();
             SuspendLayout();
             // 
             // menuStrip1
             // 
-            menuStrip1.Items.AddRange(new ToolStripItem[] { fileToolStripMenuItem, recordKeepingToolStripMenuItem });
+            menuStrip1.Items.AddRange(new ToolStripItem[] { fileToolStripMenuItem, recordKeepingToolStripMenuItem, testAreaToolStripMenuItem });
             menuStrip1.Location = new Point(0, 0);
             menuStrip1.Name = "menuStrip1";
-            menuStrip1.Size = new Size(800, 24);
+            menuStrip1.Size = new Size(1101, 24);
             menuStrip1.TabIndex = 1;
             menuStrip1.Text = "menuStrip1";
             // 
@@ -56,7 +61,7 @@
             // exitToolStripMenuItem
             // 
             exitToolStripMenuItem.Name = "exitToolStripMenuItem";
-            exitToolStripMenuItem.Size = new Size(180, 22);
+            exitToolStripMenuItem.Size = new Size(93, 22);
             exitToolStripMenuItem.Text = "E&xit";
             exitToolStripMenuItem.Click += ExitToolStripMenuItem_Click;
             // 
@@ -71,7 +76,7 @@
             // 
             sermonFilerToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { maintainSermonFilerToolStripMenuItem });
             sermonFilerToolStripMenuItem.Name = "sermonFilerToolStripMenuItem";
-            sermonFilerToolStripMenuItem.Size = new Size(180, 22);
+            sermonFilerToolStripMenuItem.Size = new Size(140, 22);
             sermonFilerToolStripMenuItem.Text = "Sermon Filer";
             // 
             // maintainSermonFilerToolStripMenuItem
@@ -81,11 +86,47 @@
             maintainSermonFilerToolStripMenuItem.Text = "Maintain Sermon Filer";
             maintainSermonFilerToolStripMenuItem.Click += MaintainSermonFilerToolStripMenuItem_Click;
             // 
+            // testAreaToolStripMenuItem
+            // 
+            testAreaToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { bindToModelToolStripMenuItem, bindToViewToolStripMenuItem, bindToViewWithEqualityToolStripMenuItem });
+            testAreaToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { bindToModelToolStripMenuItem, bindToViewToolStripMenuItem, validateModelToolStripMenuItem });
+            testAreaToolStripMenuItem.Name = "testAreaToolStripMenuItem";
+            testAreaToolStripMenuItem.Size = new Size(66, 20);
+            testAreaToolStripMenuItem.Text = "Test Area";
+            // 
+            // bindToModelToolStripMenuItem
+            // 
+            bindToModelToolStripMenuItem.Name = "bindToModelToolStripMenuItem";
+            bindToModelToolStripMenuItem.Size = new Size(212, 22);
+            bindToModelToolStripMenuItem.Text = "Bind To Model";
+            bindToModelToolStripMenuItem.Click += BindToModelToolStripMenuItem_Click;
+            // 
+            // bindToViewToolStripMenuItem
+            // 
+            bindToViewToolStripMenuItem.Name = "bindToViewToolStripMenuItem";
+            bindToViewToolStripMenuItem.Size = new Size(212, 22);
+            bindToViewToolStripMenuItem.Text = "Bind To View";
+            bindToViewToolStripMenuItem.Click += BindToViewToolStripMenuItem_Click;
+            // 
+            // bindToViewWithEqualityToolStripMenuItem
+            // 
+            bindToViewWithEqualityToolStripMenuItem.Name = "bindToViewWithEqualityToolStripMenuItem";
+            bindToViewWithEqualityToolStripMenuItem.Size = new Size(212, 22);
+            bindToViewWithEqualityToolStripMenuItem.Text = "Bind To View with Equality";
+            bindToViewWithEqualityToolStripMenuItem.Click += BindToViewWithEqualityToolStripMenuItem_Click;
+            // 
+            // validateModelToolStripMenuItem
+            // 
+            validateModelToolStripMenuItem.Name = "validateModelToolStripMenuItem";
+            validateModelToolStripMenuItem.Size = new Size(180, 22);
+            validateModelToolStripMenuItem.Text = "Validate Model";
+            validateModelToolStripMenuItem.Click += ValidateModelToolStripMenuItem_Click;
+            // 
             // MainView
             // 
             AutoScaleDimensions = new SizeF(7F, 15F);
             AutoScaleMode = AutoScaleMode.Font;
-            ClientSize = new Size(800, 450);
+            ClientSize = new Size(1101, 636);
             Controls.Add(menuStrip1);
             IsMdiContainer = true;
             MainMenuStrip = menuStrip1;
@@ -105,5 +146,10 @@
         private ToolStripMenuItem recordKeepingToolStripMenuItem;
         private ToolStripMenuItem sermonFilerToolStripMenuItem;
         private ToolStripMenuItem maintainSermonFilerToolStripMenuItem;
+        private ToolStripMenuItem testAreaToolStripMenuItem;
+        private ToolStripMenuItem bindToModelToolStripMenuItem;
+        private ToolStripMenuItem bindToViewToolStripMenuItem;
+        private ToolStripMenuItem bindToViewWithEqualityToolStripMenuItem;
+        private ToolStripMenuItem validateModelToolStripMenuItem;
     }
 }

MVPLearning/MainView.cs

@@ -1,4 +1,8 @@
 using MVPLearning.RecordKeeping.SermonFiler;
+using MVPLearning.TestingArea.ModelProperties;
+using MVPLearning.TestingArea.ViewModelEquality;
+using MVPLearning.TestingArea.Validation;
+using MVPLearning.TestingArea.ViewProperties;
 
 namespace MVPLearning
 {
@@ -18,5 +22,25 @@ namespace MVPLearning
         {
             Application.Exit();
         }
+
+        private void BindToModelToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            _ = new ModelPropertiesPresenter(new ModelPropertiesView() { MdiParent = this });
+        }
+
+        private void BindToViewToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            _ = new ViewPropertiesPresenter(new ViewPropertiesView() { MdiParent = this });
+        }
+
+        private void BindToViewWithEqualityToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            _ = new ViewModelEqualityPresenter(new ViewModelEqualityView() {  MdiParent = this });
+        }
+
+        private void ValidateModelToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            _ = new ValidateController(new ValidateForm() { MdiParent = this });
+        }
     }
 }

MVPLearning/RecordKeeping/SermonFiler/IMaintainSermonFilerView.cs

@@ -12,7 +12,7 @@
         event EventHandler? BrowseButtonClicked;
         event EventHandler<string>? LaunchButtonClicked;
         event EventHandler<MaintainSermonFilerModel>? SaveButtonClicked;
-        event EventHandler? CancelButtonClicked;
+        event EventHandler<int>? CancelButtonClicked;
 
     }
 }

MVPLearning/RecordKeeping/SermonFiler/MaintainSermonFilerModel.cs

@@ -22,10 +22,8 @@ namespace MVPLearning.RecordKeeping.SermonFiler
         private string _minister = string.Empty;
         public string Where { get => _where; set => SetProperty(ref _where, value); }
         private string _where = string.Empty;
-        public string Ref_No { get => _ref_No; set => SetProperty(ref _where, value); }
-#pragma warning disable IDE0044 // Add readonly modifier
+        public string Ref_No { get => _ref_No; set => SetProperty(ref _ref_No, value); }
         private string _ref_No = string.Empty;
-#pragma warning restore IDE0044 // Add readonly modifier
         public string Notes { get => _notes; set => SetProperty(ref _notes, value); }
         private string _notes = string.Empty;
         public string Filename { get => _filename; set => SetProperty(ref _filename, value); }
@@ -69,6 +67,7 @@ namespace MVPLearning.RecordKeeping.SermonFiler
             hash.Add(Filename);
             hash.Add(Web);
             return hash.ToHashCode();
+            //return base.GetHashCode();
         }
     }
 }

MVPLearning/RecordKeeping/SermonFiler/MaintainSermonFilerView.cs

@@ -16,19 +16,9 @@ namespace MVPLearning.RecordKeeping.SermonFiler
         public MaintainSermonFilerView()
         {
             InitializeComponent();
+            _model = new() { Title = "Constructor value"};
             _model.PropertyChanged += ModelChanged;
-            TextBoxTitle.Bind(_model, nameof(_model.Title));
-            TextBoxTitle.GotFocus += TextBoxTitle_GotFocus;
-            TextBoxTitle.LostFocus += TextBoxTitle_LostFocus;
-            TextBoxScriptureReference.Bind(_model, nameof(_model.Scripture));
-            DatePickerWhenDelivered.Bind(_model, nameof(_model.When));
-            TextBoxSubject.Bind(_model, nameof(_model.Subject));
-            TextBoxWhoDelivered.Bind(_model, nameof(_model.Minister));
-            TextBoxWhereDelivered.Bind(_model, nameof(_model.Where));
-            TextBoxReferenceNumber.Bind(_model, nameof(_model.Ref_No));
-            TextBoxNotes.Bind(_model, nameof(_model.Notes));
-            TextBoxFileName.Bind(_model, nameof(_model.Filename));
-            TextBoxWebUrl.Bind(_model, nameof(_model.Web));
+            BindControls();
             //TextBoxFileName.TextChanged += TextBoxFileName_TextChanged  ;
             //ButtonLaunch.Enabled = !string.IsNullOrEmpty(_model.Filename);
         }
@@ -36,6 +26,7 @@ namespace MVPLearning.RecordKeeping.SermonFiler
         {
             if (model == null) { return; }
             _loadedModel = model;
+            _model.Seid = model.Seid;
             _model.Title = model.Title;
             _model.Scripture = model.Scripture;
             _model.When = model.When;
@@ -47,7 +38,54 @@ namespace MVPLearning.RecordKeeping.SermonFiler
             _model.Filename = model.Filename;
             _model.Web = model.Web;
             //EnableButtonLaunch();
+
+            Title = _model.Title;
+            Scripture = _model.Scripture;
+            When = _model.When;
+            Subject = _model.Subject;
+            Minister = _model.Minister;
+            Where = _model.Where;
+            Ref_No = _model.Ref_No;
+            Notes = _model.Notes;
+            Filename = _model.Filename;
+            Web = _model.Web;
         }
+        public void BindControls()
+        {
+            TextBoxTitle.Bind(this, nameof(Title));
+            TextBoxTitle.GotFocus += TextBoxTitle_GotFocus;
+            TextBoxTitle.LostFocus += TextBoxTitle_LostFocus;
+            TextBoxScriptureReference.Bind(this, nameof(Scripture));
+            DatePickerWhenDelivered.Bind(this, nameof(When));
+            TextBoxSubject.Bind(this, nameof(Subject));
+            TextBoxWhoDelivered.Bind(this, nameof(Minister));
+            TextBoxWhereDelivered.Bind(this, nameof(Where));
+            TextBoxReferenceNumber.Bind(this, nameof(Ref_No));
+            TextBoxNotes.Bind(this, nameof(Notes));
+            TextBoxFileName.Bind(this, nameof(Filename));
+            TextBoxWebUrl.Bind(this, nameof(Web));
+
+        }
+        private string _title = string.Empty;
+        public string Title { get => _title; set { if (SetProperty(ref _title, value)) { _model.Title = value; } } }
+        private string _scripture = string.Empty;
+        public string Scripture { get => _scripture; set { if (SetProperty(ref _scripture, value)) { _model.Scripture= value; } } }
+        private DateTime? _when = null;
+        public DateTime? When { get => _when; set { if (SetProperty(ref _when, value)) { _model.When = value; } } }
+        private string _subject = string.Empty;
+        public string Subject { get => _subject; set { if (SetProperty(ref _subject, value)) { _model.Subject = value; } } }
+        private string _minister = string.Empty;
+        public string Minister { get => _minister; set { if (SetProperty(ref _minister, value)) { _model.Minister = value; } } }
+        private string _where = string.Empty;
+        public string Where { get => _where; set { if (SetProperty(ref _where, value)) { _model.Where = value; } } }
+        private string _ref_no = string.Empty;
+        public string Ref_No { get => _ref_no; set { if (SetProperty(ref _ref_no, value)) { _model.Ref_No = value; } } }
+        private string _notes = string.Empty;
+        public string Notes { get => _notes; set { if (SetProperty(ref _notes, value)) { _model.Notes = value; } } }
+        private string _filename = string.Empty;
+        public string Filename { get => _filename; set { if (SetProperty(ref _filename, value)) { _model.Filename = value; } } }
+        private string _web = string.Empty;
+        public string Web { get => _web; set {  if (SetProperty(ref _web, value)) { _model.Web = value; } } }
         private void TextBoxTitle_LostFocus(object? sender, EventArgs e)
         {
             WarnTitleIsEmpty();
@@ -62,6 +100,9 @@ namespace MVPLearning.RecordKeeping.SermonFiler
         {
             if (e.PropertyName == nameof(_model.Filename)) { EnableButtonLaunch(); }
             if (e.PropertyName == nameof(_model.Title)) { WarnTitleIsEmpty(); }
+            bool enableButtons = !_model.Equals(_loadedModel);
+            ButtonSave.Enabled = enableButtons;
+            ButtonCancel.Enabled = enableButtons;
         }
         private void WarnTitleIsEmpty()
         {
@@ -85,7 +126,7 @@ namespace MVPLearning.RecordKeeping.SermonFiler
         public event EventHandler? BrowseButtonClicked;
         public event EventHandler<string>? LaunchButtonClicked;
         public event EventHandler<MaintainSermonFilerModel>? SaveButtonClicked;
-        public event EventHandler? CancelButtonClicked;
+        public event EventHandler<int>? CancelButtonClicked;
 
         private void AddButton_Click(object sender, EventArgs _) { if (CheckForChangedData()) { AddButtonClicked?.Invoke(sender, EventArgs.Empty); } }
         private void DeleteButton_Click(object sender, EventArgs _) { DeleteButtonClicked?.Invoke(sender, _model.Seid); }
@@ -96,7 +137,7 @@ namespace MVPLearning.RecordKeeping.SermonFiler
         private void BrowseButton_Click(object sender, EventArgs _) { if (CheckForChangedData()) { BrowseButtonClicked?.Invoke(sender, EventArgs.Empty); } }
         private void LaunchButton_Click(object sender, EventArgs _) { LaunchButtonClicked?.Invoke(sender, _model.Filename); }
         private void SaveButton_Click(object sender, EventArgs _) { SaveButtonClicked?.Invoke(sender, _model); }
-        private void CancelButton_Click(object sender, EventArgs _) { if (_loadedModel != null) { LoadData(_loadedModel); } }
+        private void CancelButton_Click(object sender, EventArgs _) { CancelButtonClicked?.Invoke(sender, _model.Seid); }
 
 
 
@@ -113,5 +154,6 @@ namespace MVPLearning.RecordKeeping.SermonFiler
             return true;
         }
 
+       
     }
 }

MVPLearning/RecordKeeping/SermonFiler/MaintainSermonFilerView.resx

@@ -1,17 +1,17 @@
 <?xml version="1.0" encoding="utf-8"?>
 <root>
-  <!-- 
+  <!--
     Microsoft ResX Schema 
-    
+
     Version 2.0
-    
-    The primary goals of this format is to allow a simple XML format 
-    that is mostly human readable. The generation and parsing of the 
-    various data types are done through the TypeConverter classes 
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
     associated with the data types.
-    
+
     Example:
-    
+
     ... ado.net/XML headers & schema ...
     <resheader name="resmimetype">text/microsoft-resx</resheader>
     <resheader name="version">2.0</resheader>
@@ -26,36 +26,36 @@
         <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
         <comment>This is a comment</comment>
     </data>
-                
-    There are any number of "resheader" rows that contain simple 
+
+    There are any number of "resheader" rows that contain simple
     name/value pairs.
-    
-    Each data row contains a name, and value. The row also contains a 
-    type or mimetype. Type corresponds to a .NET class that support 
-    text/value conversion through the TypeConverter architecture. 
-    Classes that don't support this are serialized and stored with the 
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
     mimetype set.
-    
-    The mimetype is used for serialized objects, and tells the 
-    ResXResourceReader how to depersist the object. This is currently not 
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
     extensible. For a given mimetype the value must be set accordingly:
-    
-    Note - application/x-microsoft.net.object.binary.base64 is the format 
-    that the ResXResourceWriter will generate, however the reader can 
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
     read any of the formats listed below.
-    
+
     mimetype: application/x-microsoft.net.object.binary.base64
-    value   : The object must be serialized with 
+    value   : The object must be serialized with
             : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
             : and then encoded with base64 encoding.
     
     mimetype: application/x-microsoft.net.object.soap.base64
-    value   : The object must be serialized with 
+    value   : The object must be serialized with
             : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
             : and then encoded with base64 encoding.
 
     mimetype: application/x-microsoft.net.object.bytearray.base64
-    value   : The object must be serialized into a byte array 
+    value   : The object must be serialized into a byte array
             : using a System.ComponentModel.TypeConverter
             : and then encoded with base64 encoding.
     -->

MVPLearning/TestingArea/AreaStrings.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MVPLearning.TestingArea
+{
+    static class AreaStrings
+    {
+        public static string LastNameEmpty {get; }= "Last name cannot be empty.";
+    }
+}

MVPLearning/TestingArea/ModelProperties/IModelPropertiesView.cs

@@ -0,0 +1,10 @@
+
+namespace MVPLearning.TestingArea.ModelProperties
+{
+    internal interface IModelPropertiesView
+    {
+        event EventHandler<string>? ButtonClick;
+
+        void LoadData(ModelPropertiesModel model);
+    }
+}

MVPLearning/TestingArea/ModelProperties/ModelPropertiesModel.cs

@@ -0,0 +1,26 @@
+using MVPLearning.Structure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MVPLearning.TestingArea.ModelProperties
+{
+    internal class ModelPropertiesModel : ObservableObject
+    {
+        public string FirstName { get => _firstName; set => SetProperty(ref _firstName, value); }
+        private string _firstName = string.Empty;
+
+        public override bool Equals(object? obj)
+        {
+            return obj is ModelPropertiesModel model &&
+                   FirstName == model.FirstName;
+        }
+
+        public override int GetHashCode()
+        {
+            return base.GetHashCode();
+        }
+    }
+}

MVPLearning/TestingArea/ModelProperties/ModelPropertiesPresenter.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MVPLearning.TestingArea.ModelProperties
+{
+    internal class ModelPropertiesPresenter
+    {
+        private readonly IModelPropertiesView _view;
+
+        public ModelPropertiesPresenter(IModelPropertiesView view)
+        {
+            _view = view;
+            _view.ButtonClick += ButtonClick;
+            _view.LoadData(new() { FirstName = "Mary" });
+            if (_view is Form form) { form.Show(); }
+        }
+
+        private void ButtonClick(object? sender, string e)
+        {
+            _view.LoadData(new() { FirstName = e });
+        }
+    }
+}

MVPLearning/TestingArea/ModelProperties/ModelPropertiesView.Designer.cs

@@ -0,0 +1,113 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MVPLearning.TestingArea.ModelProperties
+{
+    internal partial class ModelPropertiesView
+    { /// <summary>
+      ///  Required designer variable.
+      /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        ///  Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        ///  Required method for Designer support - do not modify
+        ///  the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            baseTextBox1 = new BaseLibrary.BaseTextBox();
+            button1 = new Button();
+            button2 = new Button();
+            button3 = new Button();
+            label1 = new Label();
+            SuspendLayout();
+            // 
+            // baseTextBox1
+            // 
+            baseTextBox1.BorderStyle = BorderStyle.FixedSingle;
+            baseTextBox1.Location = new Point(12, 12);
+            baseTextBox1.Name = "baseTextBox1";
+            baseTextBox1.Size = new Size(260, 23);
+            baseTextBox1.TabIndex = 0;
+            // 
+            // button1
+            // 
+            button1.Location = new Point(12, 41);
+            button1.Name = "button1";
+            button1.Size = new Size(75, 23);
+            button1.TabIndex = 1;
+            button1.Text = "Mary";
+            button1.UseVisualStyleBackColor = true;
+            button1.Click += Button_Click;
+            // 
+            // button2
+            // 
+            button2.Location = new Point(105, 41);
+            button2.Name = "button2";
+            button2.Size = new Size(75, 23);
+            button2.TabIndex = 2;
+            button2.Text = "Sara";
+            button2.UseVisualStyleBackColor = true;
+            button2.Click += Button_Click;
+            // 
+            // button3
+            // 
+            button3.Location = new Point(197, 41);
+            button3.Name = "button3";
+            button3.Size = new Size(75, 23);
+            button3.TabIndex = 3;
+            button3.Text = "John";
+            button3.UseVisualStyleBackColor = true;
+            button3.Click += Button_Click;
+            // 
+            // label1
+            // 
+            label1.AutoSize = true;
+            label1.Font = new Font("Segoe UI", 16F);
+            label1.ForeColor = SystemColors.Highlight;
+            label1.Location = new Point(11, 154);
+            label1.Name = "label1";
+            label1.Size = new Size(262, 30);
+            label1.TabIndex = 4;
+            label1.Text = "A change has been made.";
+            // 
+            // ModelPropertiesView
+            // 
+            ClientSize = new Size(284, 261);
+            Controls.Add(label1);
+            Controls.Add(button3);
+            Controls.Add(button2);
+            Controls.Add(button1);
+            Controls.Add(baseTextBox1);
+            Name = "ModelPropertiesView";
+            Text = "Bind to Model";
+            ResumeLayout(false);
+            PerformLayout();
+        }
+        #endregion
+
+        private BaseLibrary.BaseTextBox baseTextBox1;
+        private Button button1;
+        private Button button2;
+        private Button button3;
+        private Label label1;
+    }
+}

MVPLearning/TestingArea/ModelProperties/ModelPropertiesView.cs

@@ -0,0 +1,41 @@
+using MVPLearning.BaseLibrary;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MVPLearning.TestingArea.ModelProperties
+{
+    internal partial class ModelPropertiesView : BaseForm, IModelPropertiesView
+    {
+        private readonly ModelPropertiesModel _model = new();
+        private ModelPropertiesModel? _loadedModel;
+        public ModelPropertiesView()
+        {
+            InitializeComponent();
+            baseTextBox1.Bind(_model, nameof(_model.FirstName));
+            _model.PropertyChanged += ModelChanged;
+
+        }
+
+        private void ModelChanged(object? sender, PropertyChangedEventArgs e)
+        {
+            label1.Visible = !_model.Equals(_loadedModel);
+        }
+
+        public void LoadData(ModelPropertiesModel model)
+        {
+            _loadedModel = model;
+            _model.FirstName = model.FirstName;
+        }
+
+        private void Button_Click(object sender, EventArgs e)
+        {
+            ButtonClick?.Invoke(this, ((Button)sender).Text);
+        }
+
+        public event EventHandler<string>? ButtonClick;
+    }
+}

MVPLearning/TestingArea/ModelProperties/ModelPropertiesView.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema 
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

MVPLearning/TestingArea/Validation/IValidateForm.cs

@@ -0,0 +1,11 @@
+
+namespace MVPLearning.TestingArea.Validation
+{
+    public interface IValidateForm
+    {
+        event EventHandler<ValidationModel>? Save;
+
+        void Invalid(ValidateInvalid model);
+        void LoadForm(ValidationModel model);
+    }
+}

MVPLearning/TestingArea/Validation/ValidateController.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MVPLearning.TestingArea.Validation
+{
+    public class ValidateController
+    {
+        private readonly IValidateForm _form;
+
+        public ValidateController(IValidateForm form) {
+            _form = form;
+            _form.Save += Save;
+            _form.LoadForm(new() { Id = 0, Firstname = "John", Lastname = "Doe" });
+            if (_form is Form window) { window.Show(); }
+        }
+
+        private void Save(object? sender, ValidationModel e)
+        {
+            if (e == null || string.IsNullOrEmpty(e.Lastname)) { _form.Invalid(new()); return; }
+
+            ValidationModel model = new() { Firstname = e.Firstname, Lastname = e.Lastname, Id = e.Id };
+            _form.LoadForm(model);
+        }
+    }
+}

MVPLearning/TestingArea/Validation/ValidateForm.Designer.cs

@@ -0,0 +1,121 @@
+namespace MVPLearning.TestingArea.Validation
+{
+    partial class ValidateForm
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            lblFirstname = new BaseLibrary.BaseLabel();
+            txtFirstname = new BaseLibrary.BaseTextBox();
+            txtLastname = new BaseLibrary.BaseTextBox();
+            lblLastname = new BaseLibrary.BaseLabel();
+            btnSave = new BaseLibrary.BaseButton();
+            baseButton1 = new BaseLibrary.BaseButton();
+            SuspendLayout();
+            // 
+            // lblFirstname
+            // 
+            lblFirstname.AutoSize = true;
+            lblFirstname.Location = new Point(12, 9);
+            lblFirstname.Name = "lblFirstname";
+            lblFirstname.Size = new Size(65, 15);
+            lblFirstname.TabIndex = 0;
+            lblFirstname.Text = "First name:";
+            // 
+            // txtFirstname
+            // 
+            txtFirstname.BorderStyle = BorderStyle.FixedSingle;
+            txtFirstname.Location = new Point(83, 7);
+            txtFirstname.MaxLength = 20;
+            txtFirstname.Name = "txtFirstname";
+            txtFirstname.Size = new Size(155, 23);
+            txtFirstname.TabIndex = 1;
+            // 
+            // txtLastname
+            // 
+            txtLastname.BorderStyle = BorderStyle.FixedSingle;
+            txtLastname.Location = new Point(83, 36);
+            txtLastname.MaxLength = 20;
+            txtLastname.Name = "txtLastname";
+            txtLastname.Size = new Size(155, 23);
+            txtLastname.TabIndex = 3;
+            // 
+            // lblLastname
+            // 
+            lblLastname.AutoSize = true;
+            lblLastname.Location = new Point(12, 38);
+            lblLastname.Name = "lblLastname";
+            lblLastname.Size = new Size(64, 15);
+            lblLastname.TabIndex = 2;
+            lblLastname.Text = "Last name:";
+            // 
+            // btnSave
+            // 
+            btnSave.Location = new Point(163, 65);
+            btnSave.Name = "btnSave";
+            btnSave.Size = new Size(75, 23);
+            btnSave.TabIndex = 4;
+            btnSave.Text = "Save";
+            btnSave.UseVisualStyleBackColor = true;
+            btnSave.Click += Save_Click;
+            // 
+            // baseButton1
+            // 
+            baseButton1.Location = new Point(83, 65);
+            baseButton1.Name = "baseButton1";
+            baseButton1.Size = new Size(75, 23);
+            baseButton1.TabIndex = 5;
+            baseButton1.Text = "Test";
+            baseButton1.UseVisualStyleBackColor = true;
+            baseButton1.Click += Test_Click;
+            // 
+            // ValidateForm
+            // 
+            AutoScaleDimensions = new SizeF(7F, 15F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(331, 174);
+            Controls.Add(baseButton1);
+            Controls.Add(btnSave);
+            Controls.Add(txtLastname);
+            Controls.Add(lblLastname);
+            Controls.Add(txtFirstname);
+            Controls.Add(lblFirstname);
+            Name = "ValidateForm";
+            Text = "ValidateForm";
+            ResumeLayout(false);
+            PerformLayout();
+        }
+
+        #endregion
+
+        private BaseLibrary.BaseLabel lblFirstname;
+        private BaseLibrary.BaseTextBox txtFirstname;
+        private BaseLibrary.BaseTextBox txtLastname;
+        private BaseLibrary.BaseLabel lblLastname;
+        private BaseLibrary.BaseButton btnSave;
+        private BaseLibrary.BaseButton baseButton1;
+    }
+}

MVPLearning/TestingArea/Validation/ValidateForm.cs

@@ -0,0 +1,63 @@
+using MVPLearning.BaseLibrary;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace MVPLearning.TestingArea.Validation
+{
+    public partial class ValidateForm : BaseForm, IValidateForm
+    {
+        private readonly ValidationModel _model = new();
+        private ValidationModel? _loadedModel;
+        public ValidateForm()
+        {
+            InitializeComponent();
+            _model.PropertyChanged += ModelChanged;
+            txtFirstname.Bind(_model, nameof(_model.Firstname));
+            txtLastname.Bind(_model, nameof(_model.Lastname));
+        }
+
+        private void ModelChanged(object? sender, PropertyChangedEventArgs e)
+        {
+            EnableSave();
+        }
+        private void EnableSave()
+        {
+            bool enable = !_model.Equals(_loadedModel);
+            btnSave.Enabled = enable;
+        }
+        public event EventHandler<ValidationModel>? Save;
+        public void LoadForm(ValidationModel model)
+        {
+            _loadedModel = model;
+            _model.Firstname = model.Firstname;
+            _model.Lastname = model.Lastname;
+            _model.Id = model.Id;
+            EnableSave();
+        }
+        public void Invalid(ValidateInvalid model)
+        {
+            if (model.Lastname != null)
+            {
+                txtLastname.Focus();
+                MessageBox.Show(model.Lastname, Text);
+            }
+        }
+
+        private void Save_Click(object sender, EventArgs e)
+        {
+            Save?.Invoke(this, _model);
+        }
+
+        private void Test_Click(object sender, EventArgs e)
+        {
+            _model.Firstname = "Test";
+        }
+    }
+}

MVPLearning/TestingArea/Validation/ValidateForm.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema 
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

MVPLearning/TestingArea/Validation/ValidateInvalid.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MVPLearning.TestingArea.Validation
+{
+    public class ValidateInvalid
+    {
+        public string Lastname { get; set; } = AreaStrings.LastNameEmpty;
+    }
+}

MVPLearning/TestingArea/Validation/ValidationModel.cs

@@ -0,0 +1,32 @@
+using MVPLearning.Structure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MVPLearning.TestingArea.Validation
+{
+    public class ValidationModel : ObservableObject
+    {
+        private string _firstname = string.Empty;
+        private string _lastname = string.Empty;
+        private int _id;
+
+        public string Firstname { get { return _firstname; } set { SetProperty(ref _firstname, value); } }
+        public string Lastname { get { return _lastname; } set { SetProperty(ref _lastname, value); } }
+        public int Id { get { return _id; } set { SetProperty(ref _id, value); } }
+
+        public override bool Equals(object? obj)
+        {
+            return obj is ValidationModel model &&
+                   Id == model.Id &&
+                   Firstname == model.Firstname &&
+                   Lastname == model.Lastname;
+        }
+        public override int GetHashCode()
+        {
+            return base.GetHashCode();
+        }
+    }
+}

MVPLearning/TestingArea/ViewModelEquality/IViewModelEqualityView.cs

@@ -0,0 +1,11 @@
+using MVPLearning.TestingArea.ViewProperties;
+
+namespace MVPLearning.TestingArea.ViewModelEquality
+{
+    public interface IViewModelEqualityView
+    {
+        event EventHandler<string>? ButtonClick;
+
+        void LoadData(ViewModelEqualityModel model);
+    }
+}

MVPLearning/TestingArea/ViewModelEquality/ViewModelEqualityModel.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MVPLearning.TestingArea.ViewModelEquality
+{
+    public class ViewModelEqualityModel
+    {
+        public string FirstName { get; set; } = string.Empty;
+
+        public override bool Equals(object? obj)
+        {
+            return obj is ViewModelEqualityModel model &&
+                   FirstName == model.FirstName;
+        }
+
+        public override int GetHashCode()
+        {
+            return HashCode.Combine(FirstName);
+        }
+    }
+}

MVPLearning/TestingArea/ViewModelEquality/ViewModelEqualityPresenter.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MVPLearning.TestingArea.ViewModelEquality
+{
+    public class ViewModelEqualityPresenter
+    {
+        private readonly IViewModelEqualityView _view;
+
+        public ViewModelEqualityPresenter(IViewModelEqualityView view)
+        {
+            _view = view;
+            _view.LoadData(new() { FirstName = "Mary" });
+            _view.ButtonClick += ButtonClick;
+            if (_view is Form form) { form.Show(); }
+        }
+
+        private void ButtonClick(object? sender, string e)
+        {
+            _view.LoadData(new() { FirstName = e });
+        }
+    }
+}

MVPLearning/TestingArea/ViewModelEquality/ViewModelEqualityView.Designer.cs

@@ -0,0 +1,111 @@
+namespace MVPLearning.TestingArea.ViewModelEquality
+{
+    partial class ViewModelEqualityView
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            baseTextBox1 = new BaseLibrary.BaseTextBox();
+            button1 = new Button();
+            button2 = new Button();
+            button3 = new Button();
+            label1 = new Label();
+            SuspendLayout();
+            // 
+            // baseTextBox1
+            // 
+            baseTextBox1.BorderStyle = BorderStyle.FixedSingle;
+            baseTextBox1.Location = new Point(12, 12);
+            baseTextBox1.Name = "baseTextBox1";
+            baseTextBox1.Size = new Size(269, 23);
+            baseTextBox1.TabIndex = 0;
+            // 
+            // button1
+            // 
+            button1.Location = new Point(12, 41);
+            button1.Name = "button1";
+            button1.Size = new Size(75, 23);
+            button1.TabIndex = 1;
+            button1.Text = "Mary";
+            button1.UseVisualStyleBackColor = true;
+            button1.Click += Button_Click;
+            // 
+            // button2
+            // 
+            button2.Location = new Point(109, 41);
+            button2.Name = "button2";
+            button2.Size = new Size(75, 23);
+            button2.TabIndex = 2;
+            button2.Text = "Sara";
+            button2.UseVisualStyleBackColor = true;
+            button2.Click += Button_Click;
+            // 
+            // button3
+            // 
+            button3.Location = new Point(206, 41);
+            button3.Name = "button3";
+            button3.Size = new Size(75, 23);
+            button3.TabIndex = 3;
+            button3.Text = "John";
+            button3.UseVisualStyleBackColor = true;
+            button3.Click += Button_Click;
+            // 
+            // label1
+            // 
+            label1.AutoSize = true;
+            label1.Font = new Font("Segoe UI", 16F);
+            label1.ForeColor = SystemColors.Highlight;
+            label1.Location = new Point(15, 107);
+            label1.Name = "label1";
+            label1.Size = new Size(262, 30);
+            label1.TabIndex = 5;
+            label1.Text = "A change has been made.";
+            // 
+            // ViewModelEqualityView
+            // 
+            AutoScaleDimensions = new SizeF(7F, 15F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(293, 245);
+            Controls.Add(label1);
+            Controls.Add(button3);
+            Controls.Add(button2);
+            Controls.Add(button1);
+            Controls.Add(baseTextBox1);
+            Name = "ViewModelEqualityView";
+            Text = "View Properties with Model Equality";
+            ResumeLayout(false);
+            PerformLayout();
+        }
+
+        #endregion
+
+        private BaseLibrary.BaseTextBox baseTextBox1;
+        private Button button1;
+        private Button button2;
+        private Button button3;
+        private Label label1;
+    }
+}

MVPLearning/TestingArea/ViewModelEquality/ViewModelEqualityView.cs

@@ -0,0 +1,42 @@
+using MVPLearning.BaseLibrary;
+using MVPLearning.TestingArea.ViewProperties;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace MVPLearning.TestingArea.ViewModelEquality
+{
+    public partial class ViewModelEqualityView : BaseForm, IViewModelEqualityView
+    {
+        public ViewModelEqualityView()
+        {
+            InitializeComponent();
+            baseTextBox1.Bind(this, nameof(FirstName));
+            PropertyChanged += ModelChanged;
+        }
+
+        private void ModelChanged(object? sender, PropertyChangedEventArgs e)
+        {
+            label1.Visible = !_model.Equals(_loadedModel);
+        }
+
+        private readonly ViewModelEqualityModel _model = new();
+        private ViewModelEqualityModel? _loadedModel;
+
+        private string _firstName = string.Empty;
+        public string FirstName { get => _firstName; set { _model.FirstName = value; SetProperty(ref _firstName, value); } }
+        public event EventHandler<string>? ButtonClick;
+        public void LoadData(ViewModelEqualityModel model)
+        {
+            _loadedModel = model;
+            FirstName = model.FirstName;
+        }
+        private void Button_Click(object sender, EventArgs e) { ButtonClick?.Invoke(this, ((Button)sender).Text); }
+    }
+}

MVPLearning/TestingArea/ViewModelEquality/ViewModelEqualityView.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema 
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

MVPLearning/TestingArea/ViewProperties/IViewPropertiesView.cs

@@ -0,0 +1,12 @@
+
+namespace MVPLearning.TestingArea.ViewProperties
+{
+    public interface IViewPropertiesView
+    {
+        string FirstName { get; set; }
+
+        event EventHandler<string> ButtonClick;
+
+        void LoadData(ViewPropertiesModel model);
+    }
+}

MVPLearning/TestingArea/ViewProperties/ViewPropertiesModel.cs

@@ -0,0 +1,7 @@
+namespace MVPLearning.TestingArea.ViewProperties
+{
+    public class ViewPropertiesModel 
+    {
+        public string FirstName { get; set; } = string.Empty;
+    }
+}

MVPLearning/TestingArea/ViewProperties/ViewPropertiesPresenter.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MVPLearning.TestingArea.ViewProperties
+{
+    internal class ViewPropertiesPresenter
+    {
+        private readonly ViewPropertiesView _view;
+
+        public ViewPropertiesPresenter(ViewPropertiesView view)
+        {
+            _view = view;
+            _view.ButtonClick += ButtonClick;
+            _view.LoadData(new() { FirstName = "Mary" });
+            if (_view is Form form) { form.Show(); }
+        }
+
+        private void ButtonClick(object? sender, string e)
+        {
+            _view.LoadData(new() { FirstName = e });
+        }
+    }
+}

MVPLearning/TestingArea/ViewProperties/ViewPropertiesView.Designer.cs

@@ -0,0 +1,111 @@
+namespace MVPLearning.TestingArea.ViewProperties
+{
+    partial class ViewPropertiesView
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            baseTextBox1 = new BaseLibrary.BaseTextBox();
+            button1 = new Button();
+            button2 = new Button();
+            button3 = new Button();
+            label1 = new Label();
+            SuspendLayout();
+            // 
+            // baseTextBox1
+            // 
+            baseTextBox1.BorderStyle = BorderStyle.FixedSingle;
+            baseTextBox1.Location = new Point(12, 12);
+            baseTextBox1.Name = "baseTextBox1";
+            baseTextBox1.Size = new Size(308, 23);
+            baseTextBox1.TabIndex = 0;
+            // 
+            // button1
+            // 
+            button1.Location = new Point(12, 41);
+            button1.Name = "button1";
+            button1.Size = new Size(75, 23);
+            button1.TabIndex = 1;
+            button1.Text = "Mary";
+            button1.UseVisualStyleBackColor = true;
+            button1.Click += Button_Click;
+            // 
+            // button2
+            // 
+            button2.Location = new Point(129, 41);
+            button2.Name = "button2";
+            button2.Size = new Size(75, 23);
+            button2.TabIndex = 2;
+            button2.Text = "Sara";
+            button2.UseVisualStyleBackColor = true;
+            button2.Click += Button_Click;
+            // 
+            // button3
+            // 
+            button3.Location = new Point(245, 41);
+            button3.Name = "button3";
+            button3.Size = new Size(75, 23);
+            button3.TabIndex = 3;
+            button3.Text = "John";
+            button3.UseVisualStyleBackColor = true;
+            button3.Click += Button_Click;
+            // 
+            // label1
+            // 
+            label1.AutoSize = true;
+            label1.Font = new Font("Segoe UI", 16F);
+            label1.ForeColor = SystemColors.Highlight;
+            label1.Location = new Point(35, 212);
+            label1.Name = "label1";
+            label1.Size = new Size(262, 30);
+            label1.TabIndex = 4;
+            label1.Text = "A change has been made.";
+            // 
+            // ViewPropertiesView
+            // 
+            AutoScaleDimensions = new SizeF(7F, 15F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(332, 312);
+            Controls.Add(label1);
+            Controls.Add(button3);
+            Controls.Add(button2);
+            Controls.Add(button1);
+            Controls.Add(baseTextBox1);
+            Name = "ViewPropertiesView";
+            Text = "Bind To View";
+            ResumeLayout(false);
+            PerformLayout();
+        }
+
+        #endregion
+
+        private BaseLibrary.BaseTextBox baseTextBox1;
+        private Button button1;
+        private Button button2;
+        private Button button3;
+        private Label label1;
+    }
+}

MVPLearning/TestingArea/ViewProperties/ViewPropertiesView.cs

@@ -0,0 +1,39 @@
+using MVPLearning.BaseLibrary;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace MVPLearning.TestingArea.ViewProperties
+{
+    public partial class ViewPropertiesView : BaseForm, IViewPropertiesView
+    {
+        private ViewPropertiesModel? _loadedModel;
+        public ViewPropertiesView()
+        {
+            InitializeComponent();
+            baseTextBox1.Bind(this, nameof(FirstName));
+            PropertyChanged += ModelChanged;
+        }
+
+        private void ModelChanged(object? sender, PropertyChangedEventArgs e)
+        {
+            label1.Visible = _loadedModel is not null && FirstName != _loadedModel.FirstName;
+        }
+
+        private string _firstName = string.Empty;
+        public string FirstName { get => _firstName; set { SetProperty(ref _firstName, value); } }
+        public event EventHandler<string>? ButtonClick;
+        public void LoadData(ViewPropertiesModel model)
+        {
+            _loadedModel = model;
+            FirstName = model.FirstName;
+        }
+        private void Button_Click(object sender, EventArgs e) { ButtonClick?.Invoke(this, ((Button)sender).Text); }
+    }
+}

MVPLearning/TestingArea/ViewProperties/ViewPropertiesView.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema 
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>