这是用C#编写的画图程序,自认为各类的定义和逻辑都很清晰,能基本实现作图的所有功能,实现了Undo和Redo,对于画图编辑的朋友很有帮助.-This is a C# Prepared drawing process, consider all types of self-definition and the logic is very clear, can realize the basic mapping of all the features realize the Undo and Red