利用C#编写的一个小程序，用于模拟进程并发执行。以一个小的函数在picturebox中绘制图片为一个进程举例，达到模拟的效果。-With a small program written in C#, used to simulate the process of concurrent execution. A small function to draw a picture in a PictureBox Examples of a process to achieve the effect o