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 ## C#
 
-* [MSDN C# 中文文档](https://msdn.microsoft.com/zh-cn/library/kx37x362.aspx)
-* [.NET 类库参考](https://msdn.microsoft.com/zh-cn/library/gg145045.aspx)
+* [Microsoft Docs C# 官方文档](https://docs.microsoft.com/zh-cn/dotnet/csharp/)
 * [ASP.NET MVC 5 入门指南](http://www.cnblogs.com/powertoolsteam/p/aspnetmvc5-tutorials-grapecity.html)
 * [超全面的 .NET GDI+ 图形图像编程教程](http://www.cnblogs.com/LonelyShadow/p/4162318.html)
 * [.NET控件开发基础](https://github.com/JackWangCUMT/customcontrol)