How to create a simple WPF application

In Visual Studio 2008 or 2010

Open Visual Studio and choose "File", "New", "Project..." in the main menu. Choose "WPF Application" as project type. Choose a folder for your project and give it a name. Then press "OK"

Visual Studio creates the project and automatically adds some files to the solution. A Window1.xaml and an App.xaml. The structure looks quite similar to WinForms, except that the Window1.designer.cs file is no longer code but it's now declared in XAML as Window1.xaml

Open the Window1.xaml file in the WPF designer and drag a Button from the toolbox to the Window







Select the Button and doubleclick on it this create a method in the codebehind that is called, when the user clicks on the button.
******************************************************************************************************* 

<Window x:Class="FirstWpfApplication.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">

<Grid>

<Button Content="Hello Wpf"
Height="40"
Width="200"
HorizontalAlignment="Left"
Margin="150,129,0,0"
Name="button1"
VerticalAlignment="Top"
Click="button1_Click" />

</Grid>

</Window>

*******************************************************************************************************

using System;
using System.Windows;
namespace FirstWpfApplication
{

/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
 public partial class MainWindow : Window
 {
 public MainWindow()
 {
   InitializeComponent();
 }

 /// <summary>
 /// Handles the Click event of the button1 control.
 /// </summary>
 /// <param name="sender">The source of the event.</param>
 /// <param name="e">The <see cref="System.Windows.RoutedEventArgs" /> instance containing the event  data.</param>
 private void button1_Click(object sender, RoutedEventArgs e)
 {
   MessageBox.Show("Hello Wpf.", "My first WPF Application", MessageBoxButton.OK);
 }

}

*******************************************************************************************************