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Command Handler Command Binding in Xaml

<Window x:Class="WpfApplication1.Window1"     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     Title="commandWithHandler" Name="root">      <Window.CommandBindings>     <CommandBinding Command="ApplicationCommands.Open"                     Executed="OpenCmdExecuted"                     CanExecute="OpenCmdCanExecute"/>   </Window.CommandBindings>   <Window.InputBindings>     <KeyBinding Command="ApplicationCommands.Open" Gesture="CTRL+R" />   </Window.InputBindings>   <StackPanel>     <Button Command="ApplicationCommands.Open" Name="MyButton"             Height="50" Width="200">       Open (KeyBindings: Ctrl+R, Ctrl+0)     </Button>   </StackPanel> </Window> //File:Window.xaml.cs using System; using System.Windows; using System.Windows.Controls; using System.Windows.Input; namespace WpfApplication1 {     public partial class Window1 : Window     {         public Window1()         {             InitializeComponent();         }         void OpenCmdExecuted(object target, ExecutedRoutedEventArgs e)         {             String command, targetobj;             command = ((RoutedCommand)e.Command).Name;             targetobj = ((FrameworkElement)target).Name;             MessageBox.Show(command +  " : " + targetobj);         }         void OpenCmdCanExecute(object sender, CanExecuteRoutedEventArgs e)         {             e.CanExecute = true;         }     } }