用csharp及gdi+实现双缓存画图，解决画图时闪屏，刷新慢的问题，是了解双缓存画图的好东西-Gdi+ with csharp and achieve double-buffer drawing, solving the splash screen when drawing, slow refresh problem is to understand the double buffer drawing a good thing

使用双缓存实现无闪烁画图，工业画图示例。-The use of double-buffering to achieve flicker-free drawing, industrial drawing sample.