DrawTools2005的源码包，是一个C# 绘图实例包，可以绘制矩形、椭圆、直线、曲线和控制点，画图过程中可撤销操作，相当不错的类库实例。-DrawTools2005 source package, is an instance of C# graphics package, you can draw rectangles, ellipses, lines, curves and control points, the drawing process can undo, pretty goo