How to use the assembly System.web 4.0?

Question

I get warring.

Warning 1 The referenced assembly "DudePro" could not be resolved because it has a dependency on "System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" which is not in the currently targeted framework ".NETFramework,Version=v4.0,Profile=Client". Please remove references to assemblies not in the targeted framework or consider retargeting your project. GroupInvater_vk

What should I do? I need System.web

EDIT:

I create .dll. IN dll i use System.web - there are no errors!

when I plug .dll into the project and do build .dll disappears and the more it VS does not see.

Answer 1

Your project is probably targeting the .NET Client Profile, which doesn't include System.Web. You need to change your project to target the Full Profile, by using the Target Framework field on the Application tab of your project's properties.