<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="GradientBrushResourceDemo" Height="300" Width="300">
    <Window.Resources>
        <LinearGradientBrush x:Key="brushGradient"
                             StartPoint="0, 0"
                             EndPoint="1, 1">
            <LinearGradientBrush.GradientStops>
                <GradientStop Offset="0" Color="Black" />
                <GradientStop Offset="0.5" Color="Green" />
                <GradientStop Offset="1" Color="Gold" />
            </LinearGradientBrush.GradientStops>
        </LinearGradientBrush>
    </Window.Resources>
    <StackPanel>
        <TextBlock Margin="{StaticResource thicknessMargin}"
               Foreground="{StaticResource brushGradient}">
            Gradient text
        </TextBlock>
        <TextBlock Margin="{StaticResource thicknessMargin}"
                   Foreground="{StaticResource brushGradient}">
            Of black, green, and gold
        </TextBlock>
        <TextBlock Margin="{StaticResource thicknessMargin}"
                   Foreground="{StaticResource brushGradient}">
            Makes an app pretty,
        </TextBlock>
        <TextBlock Margin="{StaticResource thicknessMargin}"
                   Foreground="{StaticResource brushGradient}">
            Makes an app bold.
        </TextBlock>
    </StackPanel>
</Window>
//File:Window.xaml.cs
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace WpfApplication1
{
    public partial class Window1 : Window
    {
        public Window1()
        {
            Resources.Add("thicknessMargin", new Thickness(24, 12, 24, 23));

            InitializeComponent();
        }
    }
}

   
    
     

   
  
<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        x:Class="WpfApplication1.EventSetterDemo"
        Title="EventSetter Demo">
    <Window.Resources>
        <Style TargetType="{x:Type Button}">
            <EventSetter Event="Click" Handler="ButtonOnClick" />
        </Style>
    </Window.Resources>

    <StackPanel>
        <Button>Button 1</Button>
        <Button>Button 2</Button>
        <Button>Button 3</Button>
    </StackPanel>
</Window>
//File:Window.xaml.cs
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;

namespace WpfApplication1
{
    public partial class EventSetterDemo : Window
    {

        public EventSetterDemo()
        {
            InitializeComponent();
        }
        void ButtonOnClick(object sender, RoutedEventArgs args)
        {
            Button btn = args.Source as Button;
            Console.WriteLine(btn.Content);
        }
    }
}

   
    
     

   
  


<Window 
  x:Class="WpfApplication1.Window1"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Title="Window1" Height="600" Width="800">
  <DockPanel>
    <StackPanel DockPanel.Dock="Bottom" Orientation="Horizontal">
      <TextBox x:Name="tbxInsertionText" Width="200" Margin="5,0" />
      <Button DockPanel.Dock="Bottom" Content="Insert" Click="btnInsert_Click"/>
    </StackPanel>
    <RichTextBox x:Name="rtbTextContent" />
  </DockPanel>
</Window>
//File:Window.xaml.cs
using System.Windows;
using System.Windows.Documents;
using System.Windows.Input;

namespace WpfApplication1
{
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }

        private void btnInsert_Click(object sender, RoutedEventArgs e)
        {
            if (string.IsNullOrEmpty(tbxInsertionText.Text))
            {
                return;
            }
            rtbTextContent.BeginChange();
            if (rtbTextContent.Selection.Text != string.Empty)
            {
                rtbTextContent.Selection.Text = string.Empty;
            }
            TextPointer tp = rtbTextContent.CaretPosition.GetPositionAtOffset(0, LogicalDirection.Forward);
            rtbTextContent.CaretPosition.InsertTextInRun(tbxInsertionText.Text);
            rtbTextContent.CaretPosition = tp;
            rtbTextContent.EndChange();
            Keyboard.Focus(rtbTextContent);
        }
    }
}

   
    
     

   
  

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="WPF" Height="150" Width="250">
    <StackPanel>
        <Popup AllowsTransparency="True" Height="100" HorizontalOffset="1cm" Name="myPopup" 
                   Placement="Right" StaysOpen="True" Width="200" >
            <Border BorderBrush="Black" BorderThickness="2">
                <DockPanel Background="White" LastChildFill="True">
                    <TextBlock Background="AliceBlue" DockPanel.Dock="Top" 
                                   FontSize="16" HorizontalAlignment="Stretch" 
                                   Margin="5" Text="A WPF Popup" />
                        <Button Click="btnClosePopup_Click" Content="Close" 
                                DockPanel.Dock="Bottom" Margin="5" 
                                HorizontalAlignment="Right" MaxHeight="23"/>
                        <Image DockPanel.Dock="Top" Margin="5" 
                               Source="c:image.gif" />
                    </DockPanel>
            </Border>
        </Popup>
        <StackPanel>
            <StackPanel.Resources>
                <Style TargetType="{x:Type Button}">
                    <Setter Property="Margin" Value="2" />                        
                    <EventSetter Event="Click" Handler="btnShowPopup_Click" />
                </Style>
            </StackPanel.Resources>
            <Button Content="Show Popup" Name="btnShowPopup" />
        </StackPanel>
    </StackPanel>
</Window>

//File:Window.xaml.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Controls.Primitives;

namespace WpfApplication1
{
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }

        private void btnClosePopup_Click(object sender, RoutedEventArgs e)
        {
            myPopup.IsOpen = false;
        }

        private void btnShowPopup_Click(object sender, RoutedEventArgs e)
        {
           
            myPopup.IsOpen = true;
        }
    }
}

   
    
     

   
  
<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="WPF" Height="200" Width="300">
    <DockPanel LastChildFill="True">
        <DockPanel.Resources>
            <Style TargetType="{x:Type TreeViewItem}">
                <EventSetter Event="Selected" Handler="TreeViewItem_Selected" />
            </Style>
        </DockPanel.Resources>
        <Button Click="Button_Click" DockPanel.Dock="Bottom" Content="Show Selected" MaxHeight="23" MaxWidth="100" />
        <TreeView FontSize="16" Name="tvTree">
            <TreeViewItem Header="A" IsExpanded="True">
                <TreeViewItem Header="1">
                    <TreeViewItem Header="2" />
                    <TreeViewItem Header="3" />
                </TreeViewItem>
                <TreeViewItem Header="B" IsExpanded="True">
                    <TreeViewItem Header="11" />
                    <TreeViewItem Header="22" />
                </TreeViewItem>
            </TreeViewItem>
            <TreeViewItem Header="C">
                <TreeViewItem Header="E">
                    <TreeViewItem Header="111" />
                    <TreeViewItem Header="222" />
                    <TreeViewItem Header="333" />
                </TreeViewItem>
                <TreeViewItem Header="F">
                    <TreeViewItem Header="1111" />
                    <TreeViewItem Header="2222" />
                    <TreeViewItem Header="333" />
                </TreeViewItem>
            </TreeViewItem>
        </TreeView>
    </DockPanel>
</Window>

//File:Window.xaml.cs
using System;
using System.Windows;
using System.Windows.Controls;

namespace WpfApplication1
{
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }
        private void TreeViewItem_Selected(object sender, RoutedEventArgs e)
        {
            TreeViewItem item = sender as TreeViewItem;
            if (item == e.OriginalSource)
            {
                Console.WriteLine(item.Header);
                Console.WriteLine(item.Items.Count);
            }
            else
            {
                Console.WriteLine("Parent of selected");
                Console.WriteLine(item.Header);
                Console.WriteLine(item.Items.Count);
            }
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            TreeViewItem item = tvTree.SelectedItem as TreeViewItem;

            if (item != null)
            {
                MessageBox.Show("Item selected: " + item.Header, Title);
            }
            else
            {
                MessageBox.Show("No item selected", Title);
            }
        }
    }
}

   
    
     

   
  

<Window x:Class="HostingAWinFormsControl.Window1"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:wf="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms"
  xmlns:local="clr-namespace:HostingAWinFormsControl"
  Title="HostingAWinFormsControl">
  <Grid>
    <Grid.Resources>
      <local:People x:Key="Family">
        <local:Person Name="A" Age="11" />
        <local:Person Name="B" Age="12" />
        <local:Person Name="C" Age="37" />
      </local:People>
    </Grid.Resources>

    <WindowsFormsHost>
      <wf:DataGridView DataSource="{StaticResource Family}" />
    </WindowsFormsHost>
  </Grid>
</Window>
//File:Window.xaml.cs

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Media;
using System.Windows.Shapes;

namespace HostingAWinFormsControl {
  public class Person {
    string name;
    public string Name {
      get { return name; }
      set { name = value; }
    }

    int age;
    public int Age {
      get { return age; }
      set { age = value; }
    }

    public Person() { }

    public Person(string name, int age) {
      this.name = name;
      this.age = age;
    }
  }

  public class People : System.Collections.Generic.List<Person> { }

  public partial class Window1 : Window {
    public Window1() {
      InitializeComponent();

      //gridView.DataSource = new Person[] {
      //  new Person("A", 11),
      //  new Person("B", 12),
      //  new Person("C", 37)
      //};
    }
  }

}

   
    
     

   
  

<Window x:Class="Resources.DynamicResource"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Resources" Height="300" Width="300"
    >
  <Window.Resources>
    <ImageBrush x:Key="TileBrush" x:Name="DynamicBrush" TileMode="Tile"
                ViewportUnits="Absolute" Viewport="0 0 32 32"
                ImageSource="c:image.jpg"></ImageBrush>
  </Window.Resources>
  <StackPanel Margin="5">
    <Button Background="{DynamicResource TileBrush}" >Button</Button>
    <Button Click="cmdChange_Click" >Change the Brush</Button>
  </StackPanel>
</Window>
//File:Window.xaml.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace Resources
{
    public partial class DynamicResource : System.Windows.Window
    {
        public DynamicResource()
        {
            InitializeComponent();
        }

        private void cmdChange_Click(object sender, RoutedEventArgs e)
        {
            this.Resources["TileBrush"] = new SolidColorBrush(Colors.LightBlue);
            
            ImageBrush brush = (ImageBrush)this.Resources["TileBrush"];
            brush.Viewport = new Rect(0, 0, 5, 5);            
        }
    }
}