利用C#生成一种遮罩图像效果，图像被一个遮罩层挡住，然后由两边向中间显示，最终显示出图像，主要功能是为显示图像增加动态效果，避免单调死板，也希望通过这个小例子，让大家明白一些C#有关的图像遮罩效果。-Use C# to generate a mask image effects, the image is blocked by a mask layer, and then to the middle of the display by both sides, the final image shows the main function is to display the image to increase the dynamic effect, avoid monotony rigid, but also hope that through this small example let everyone know some C# related image mask effect.