foreach (KeyBinding binding in InputBindings)
{
	if (binding.Command == ApplicationCommands.Copy)
	{
		MessageBox.Show(binding.Modifiers.ToString() + " + " + binding.Key.ToString());
	}
}

Button b = new Button();

b.Command = ApplicationCommands.Copy;

List<string> gestures = new List<string>();

if (b.Command is RoutedCommand)
{
    RoutedCommand command =  (b.Command as RoutedCommand);

    foreach (InputGesture gesture in command.InputGestures)
    {
        if (gesture is KeyGesture)
    	gestures.Add((gesture as KeyGesture).DisplayString);
    }
}

<Button Command="ApplicationCommands.New" Content="{Binding RelativeSource={RelativeSource Self}, Path=Command.Text}"></Button>

<Window.InputBindings>
    <KeyBinding Key="C"
          Modifiers="Control"
          Command="ApplicationCommands.Copy" />
 </Window.InputBindings>