说明：  这是一位大学老师的PPT课件，专门讲述C#编程中的多线程编程问题。内容翔实，图文生动丰富，深入浅出地讲解多线程问题。
(Its a ppt document made by a college teacher who explained the Multi-thread programming technologies in C#. It had rich and various texts and pictures that help comprehending the technologies.)