System.Windows.RoutedEventArgs cannot be converted to type System.Windows.Input.MouseButtonEventArgs

C#后台代码触发按钮点击事件，下面的K1是一个Label，触发了鼠标点击左键事件

 private void Window_Activated(object sender, EventArgs e)
 { 
      //初始化点击：首页。后台代码触发          
      // K1.RaiseEvent(new RoutedEventArgs(MouseLeftButtonUpEvent));
      K1.RaiseEvent(
              new System.Windows.Input.MouseButtonEventArgs(
              Mouse.PrimaryDevice, 1, MouseButton.Left)
              {
                  RoutedEvent = MouseLeftButtonUpEvent
              }
          );
  }

最终执行的事件

  private void Label_MouseUp(object sender, MouseButtonEventArgs e)
  {
     var obj = sender as Label;
  }

参考资料
https://stackoverflow.com/questions/29364751/how-to-invoke-mousedoubleclick-on-button-code-behind