说明：  C#绘图技术，关于C#操作画笔，画布等的操作，以及高级绘图的相关知识，对于想从事绘图编程的人大有裨益
(Knowledge of C# graphics technology, operating on the C# operator brushes, canvas, etc., as well as advanced drawing, who want to engage in graphics programming is beneficial to people s congresses)