试试启用双buffer
https://docs.microsoft.com/en-us/dotnet/desktop/winforms/advanced/how-to-reduce-graphics-flicker-with-double-buffering-for-forms-and-controls?view=netframeworkdesktop-4.8

【 在 wjie 的大作中提到: 】
: 在form里加了定时器50ms refrsh一次，结果发现屏幕闪烁很厉害，10ms刷新也一样
: OnPaint里绘图代码如下，已经用了bmp贴图模式
:  Bitmap bmp = new Bitmap(1024, 768);
: ...................
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