疑难解决
问题：调试时无法接受来自Console.ReadLine()之类函数的标准输入。
解决：打开调试器配置文件launch.json，将console设置为integratedTerminal。然后就可在TERMINAL中进行IO操作。
Q: Standard input functions like Console.ReadLine() don't work while debug.
A: Open and edit the debug-configuration-file launch.json, set console as integratedTerminal. Now we can read or write in TERMINAL.
问题：Microsoft C# 扩展异常，语义分析、自动补全等功能失效。Omnisharp警告：
omnisharp
Microsoft.Common.propsnot found
解决：安装dotnet core，使用dotnet core提供的Microsoft.Common.props进行替代。
Q: C# Extension by Microsoft crashes. Features including Intelligence don't work. Omnisharp alert:
omnisharp
Microsoft.Common.propsnot found
A: Install dotnet core, and replace file with link of file Microsoft.Common.props provided by dotnet core.
