为什么我不能双击按钮在Silverlight 中创建事件处理程序？

private void myButton_Click(object sender, RoutedEventArgs e)
{
    // 在这里编写您的事件处理代码
}

public class DoubleClickBehavior
{
    public static readonly DependencyProperty CommandProperty =
        DependencyProperty.RegisterAttached("Command", typeof(ICommand), typeof(DoubleClickBehavior), new PropertyMetadata(null, OnCommandChanged));

    public static ICommand GetCommand(DependencyObject obj)
    {
        return (ICommand)obj.GetValue(CommandProperty);
    }

    public static void SetCommand(DependencyObject obj, ICommand value)
    {
        obj.SetValue(CommandProperty, value);
    }

    private static void OnCommandChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        var control = d as Control;
        if (control != null)
        {
            control.MouseLeftButtonDown += Control_MouseLeftButtonDown;
        }
    }

    private static void Control_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        var control = sender as Control;
        if (control != null && e.ClickCount == 2)
        {
            var command = GetCommand(control);
            if (command != null && command.CanExecute(null))
            {
                command.Execute(null);
            }
        }
    }
}

public ICommand MyCommand => new RelayCommand(MyCommandExecute);

private void MyCommandExecute()
{
    // 在这里编写您的事件处理代码
}