Visual Studio 2019 (WPF VB.Net Source Code & XAML) How to Create a Simple Hello World Program in VB.Net Windows Presentation Foundation (WPF App)

Visual Studio 2019 (WPF VB.Net Source Code & XAML) How to Create a Simple Hello, World! Program in VB.Net Windows Presentation Foundation (WPF Application).

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[XAML & VB.NET Code Behind]
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MainWindow.xaml

<Window x:Class="MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        mc:Ignorable="d"
        Title="WPF (VB.NET) Simple Hello, World! Program : Code A Minute : iBasskung Tutorial"
        Height="450" Width="800"
        Background="DarkCyan"
        WindowStartupLocation="CenterScreen"
        WindowState="Normal"
        WindowStyle="ThreeDBorderWindow">
 
    <Grid Margin="15">
     
        <StackPanel Orientation="Vertical"
                    HorizontalAlignment="Stretch"
                    VerticalAlignment="Center">
         
            <TextBlock Name="resultTextBlock"
                       FontSize="100"
                       Text="My TextBlock"
                       Foreground="White"
                       TextWrapping="Wrap"
                       HorizontalAlignment="Center"
                       VerticalAlignment="Top"
                       Margin="0,0,0,30"/>

            <Button Name="sayHelloButton"
                    Content="Let's say Hello :)"
                    Width="740"
                    HorizontalAlignment="Stretch"
                    HorizontalContentAlignment="Center"
                    VerticalAlignment="Stretch"
                    VerticalContentAlignment="Center"
                    FontSize="72"
                    Background="Crimson"
                    Foreground="White"
                    Height="140"
                    BorderBrush="Gold"
                    BorderThickness="6"/>

        </StackPanel>
     
    </Grid>
 
</Window>

=================

MainWindow.xaml.vb

Option Explicit On

Option Strict On

Class MainWindow

    Public Sub New()

        ' This call is required by the designer.

        InitializeComponent()

        ' Add any initialization after the InitializeComponent() call.

        resultTextBlock.Text = "..."

    End Sub

    Private Sub SayHelloButton_Click(sender As Object, e As RoutedEventArgs) Handles sayHelloButton.Click

        If Not resultTextBlock.Text.Equals("Hello, World!") Then

            resultTextBlock.Text = "Hello, World!"

        Else

            resultTextBlock.Text = "Hello, WPF !!!"

        End If

        ' Ex.1

        MessageBox.Show("Hello, World! WPF Application.", "Simple WPF (VB.NET) Hello, World! Program", MessageBoxButton.OK, MessageBoxImage.Information)

        ' Ex.2

        Dim caption As String = "Hello, World! WPF Application."

        Dim btnOK As MessageBoxButton = MessageBoxButton.OK

        Dim imgExc As MessageBoxImage = MessageBoxImage.Exclamation

        Dim message As String = $"Hello, World!{Environment.NewLine}Hello, WPF Application!"

        MessageBox.Show(message, caption, btnOK, imgExc)

    End Sub

End Class