我想尽办法用 System.Web.UI.HtmlControls; ，但我没有找到任何引用。

I tried every way to use System.Web.UI.HtmlControls; but I didn't find any reference for that.

我如何使用该命名空间？

How can I use that namespace?

推荐答案

转到您的参考为您的项目，并确保的System.Web就在那里。如果没有，用鼠标右键单击，添加引用，.NET，并添加的System.Web

Go to your References for your project and ensure System.Web is in there. If not, Right click, Add Reference, .NET, and add System.Web