这是C#写的程序，它适合开发各行业涉及图形的应用系统，例如电力、煤炭、化工、自动化监控、仿真、图形建模、图形拓扑分析、矢量绘图-This is a program written in C#, it is suitable for the development of various industries involved in graphics applications, such as electricity, coal, chemical, automation monitor, simu