什么是Control.MouseButtons的WPF版本？

MouseButtonState leftButtonState = Mouse.LeftButton;
MouseButtonState rightButtonState = Mouse.RightButton;
MouseButtonState middleButtonState = Mouse.MiddleButton;
MouseButtonState xButton1State = Mouse.XButton1;
MouseButtonState xButton2State = Mouse.XButton2;

if (leftButtonState == MouseButtonState.Pressed)
{
    // 左键被按下
}

if (rightButtonState == MouseButtonState.Pressed)
{
    // 右键被按下
}

if (middleButtonState == MouseButtonState.Pressed)
{
    // 中键被按下
}

if (xButton1State == MouseButtonState.Pressed)
{
    // 第一个扩展鼠标按钮被按下
}

if (xButton2State == MouseButtonState.Pressed)
{
    // 第二个扩展鼠标按钮被按下
}