Can't import System.Web namespace

Question

I am trying to use:

using System.Web.UI.HtmlControls;

In windows forms, but it tells me a reference is missing. So I went in the add reference but System.Web isn't on the list. I even tried going to the physical location of System.Web.Dll but when I added it it told me that it can't find the assembly.

I have no problem importing the assembly in an ASP.NET application.

Answer 1

Note if your project targets ".NET Framework 4.0 Client Profile" then this class will not work, you need to re-target your project to ".NET Framework 4.0" instead. [Credit to Matt Neerincx [MSFT] who posted this on msdn]