wpf 与winform获取鼠标左右键焦点的差异

1. winform中以Panel为例的MouseDown事件为：
   private void panelposition_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
   {
   　　    //判断鼠标左键按下
   　　    if(e.Button == System.Windows.Forms.MouseButtons.Left){//...}
          //判断鼠标左键按下
   　　    if(e.Button == System.Windows.Forms.MouseButtons.Right){//...}
   }
2. wpf中以Image为例的MouseDown事件为：
   private void imageposition_MouseDown(object sender, MouseButtonEventArgs e)
   {
           //判断鼠标左键按下
   　　    if(e.LeftButton == MouseButtonState.Pressed){//...}
          //判断鼠标左键按下
   　　    if(e.RightButton == MouseButtonState.Pressed){//...}
   }