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Use KeyBinding to bind Key event to TextBox InputBindings

<Window x:Class="Commands.NoCommandTextBox"     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     Title="NoCommandTextBox" Height="300" Width="300">     <Grid>       <TextBox Name="txt"/>     </Grid> </Window> //File:Window.xaml.vb Imports System Imports System.Collections.Generic Imports System.Text Imports System.Windows Imports System.Windows.Controls Imports System.Windows.Data Imports System.Windows.Documents Imports System.Windows.Input Imports System.Windows.Media Imports System.Windows.Media.Imaging Imports System.Windows.Shapes Namespace Commands   Public Partial Class NoCommandTextBox     Inherits System.Windows.Window     Public Sub New()       InitializeComponent()       txt.InputBindings.Add(New KeyBinding(ApplicationCommands.NotACommand, Key.C, ModifierKeys.Control))     End Sub     Private Sub SuppressCommand(sender As Object, e As CanExecuteRoutedEventArgs)       e.CanExecute = False       e.Handled = True     End Sub   End Class End Namespace