WPF - Custom Command Binding

XAML:

<UserControl.CommandBindings>
   // Command Binding
      <CommandBinding Command="Save" 
                      CanExecute="SaveCanExecute" 
                      Executed="SaveExecuted">            
      </CommandBinding>
// Custom Command Binding
      <CommandBinding Command="{x:Static local:WorkOrderDetailsTreeViewModel._SetEditorFocus}" 
                     Executed="_SetEditorFocusExecuted"/>
      </UserControl.CommandBindings>


In Code Behind:
public static RoutedCommand _SetEditorFocus = new RoutedCommand();
public ConstructoyOfTheClass()
{
_SetEditorFocus.InputGestures.Add(new KeyGesture(Key.F5, ModifierKeys.None));
}