Q:

C#/.NET - Help, I have only three classes in my System. Web namespace

I discovered the problem when I got a suggestion to use the System. Web. HttpUtility class for a certain task. 
Looking at the documentation, I should have about 50 classes in System. Web, but I have only these:
AspNetHostingPermission
AspNetHostingPermissionAttribute 
AspNetHostingPermissionLevel

I make this assumption since they are the only ones showing up in intellisense, and I get build errors when trying to use any other classes than these three. 
I'm using .NET 3.5 SP1, and in the reference dialog it says i have version 2.0 of the System. Web component. 
I'm lost.  What could be wrong?  

A:

These are the three which are in the System Reference.  
Have you added a reference to System. Web in your project?