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.

possible duplicate of [System.Web.Hosting not found in VS2008](http://stackoverflow.com/questions/4376626/system-web-hosting-not-found-in-vs2008) — Cody Gray - on strike, Mar 11 '12 at 01:46

score 5 · Accepted Answer · answered Mar 10 '12 at 22:01

5

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]

answered Mar 10 '12 at 22:01

Guy Hollington

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I am quite confident this guy is right. This has bitten me more than once. Why can't I set my framework version to the full 4.0 framework by default?! – Erik van Brakel Mar 10 '12 at 22:20
Yes, this is what it turned out to be in the end. What a useless feature!! – TheGateKeeper Mar 12 '12 at 11:01

Can't import System.Web namespace

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