这是一个用C#写的档案管理系统，系统按3部分来组织档案。 第一部分，档案盒管理。第二部分，档案清单。第三部分，发票管理。-This is a written with the C# file management system, system to organize files by 3. The first part of the file box management. The second part, the file list. The third part, invoice man