程序立即关闭，因为没有任何东西阻止它关闭.在return 0;处插入断点或在return 0;前添加Console.Read();，防止程序关闭.

The program immediately closes because there's nothing stopping it from closing. Insert a breakpoint at return 0; or add Console.Read(); before return 0; to prevent the program from closing.

完成程序后，按 Ctrl+F5(不带调试).这将在关闭窗口之前提示，这是你想要什么.

After you are done with your program, press Ctrl+F5 ( Run without debugging). This will prompt before closing the window and this is what you want.

或在最后使用这一行

Console.ReadKey();