C#模范windows画图，实现重绘，可以拉伸修改，可移动图形-C# windows drawing model to achieve redraw, you can stretch to modify, mobile graphics

人机交互画图系统，实现了比较多的功能。包括复制、删除、清空、移动等功能-Human-Computer Interaction drawing system to achieve a lot more functionality. Including copy, delete, clear, mobile and other functions