C#写的绘图板，功能还不错。实现了直线，矩形，圆形，填充矩形，填充圆形。可拖动图形位置，可改变矩形大小，可放大缩小，可输入文字，打开图片，拖动图片，可撤销。-C# to write the drawing board, features well. Implementation of linear, rectangular, circular, filled rectangle, filled circle. Can drag the

C#绘图板，直线、矩形、圆形、曲线、填充矩形、填充圆形、输入文字、路径-C# graphics tablet, line, rectangle, circle, curve, filled rectangle, filled circle, enter text, the path