使用C#图形界面生成最小生成树，核心算法使用Prim算法。图的形状可以在源文件中的图定义处修改。-C# graphical interface to generate a minimum spanning tree, the core algorithm using Prim algorithm. The graph shape defined in the source file in Figure modify.

执行学生管理的错误的抛出，并将数据写入到文件中-Execution error is thrown, and the data written to a file