I am trying to get Undo/Redo keyboard shortcuts working in my WPF application (I have my own custom functionality implemented using the [Command Pattern](https://stackoverflow.com/questions/701131/data-structure-used-to-implement-undo-and-redo-option/701135#701135)). It seems, however, that the `TextBox` control is intercepting my "Undo" RoutedUICommand.

What is the simplest way to disable this so that I can catch Ctrl+Z at the root of my UI tree? I would like to avoid putting a ton of code/XAML into each `TextBox` in my application if possible.

The following briefly demonstrates the problem:

```
<Window x:Class="InputBindingSample.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:loc="clr-namespace:InputBindingSample"
    Title="Window1" Height="300" Width="300">
    <Window.CommandBindings>
        <CommandBinding Command="loc:Window1.MyUndo" Executed="MyUndo_Executed" />
    </Window.CommandBindings>
    <DockPanel LastChildFill="True">
        <StackPanel>
            <Button Content="Ctrl+Z Works If Focus Is Here" />
            <TextBox Text="Ctrl+Z Doesn't Work If Focus Is Here" />
        </StackPanel>
    </DockPanel>
</Window>

```

---

```
using System.Windows;
using System.Windows.Input;

namespace InputBindingSample
{
    public partial class Window1
    {
        public static readonly RoutedUICommand MyUndo = new RoutedUICommand("MyUndo", "MyUndo", typeof(Window1),
            new InputGestureCollection(new[] { new KeyGesture(Key.Z, ModifierKeys.Control) }));

        public Window1() { InitializeComponent(); }

        private void MyUndo_Executed(object sender, ExecutedRoutedEventArgs e) { MessageBox.Show("MyUndo!"); }
    }
}

```