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Thumb DragStarted and DragCompleted event handler

<Canvas xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     x:Class="Thumb_wcp.Pane1">   <StackPanel>     <Thumb Name="myThumb" Background="Blue"            Width="20" Height="20"            DragStarted="onDragStarted" DragCompleted="onDragCompleted"/>   </StackPanel> </Canvas> //File:Window.xaml.cs using System; using System.Windows; using System.Windows.Controls; using System.Windows.Controls.Primitives; using System.Windows.Documents; using System.Windows.Navigation; using System.Windows.Shapes; using System.Windows.Data; using System.Windows.Media; namespace Thumb_wcp {     public partial class Pane1 : Canvas     {         void onDragStarted(object sender, DragStartedEventArgs e)         {             myThumb.Background = Brushes.Orange;         }         void onDragCompleted(object sender, DragCompletedEventArgs e)         {             myThumb.Background = Brushes.Blue;         }     } }