The HttpValueCollection you're using in your example is not actually trivial, and makes use of plenty of other parts of the System.Web library to encode a valid http url for you. It is possible to extract the source for the parts you need, but it would likely cascade into quite...
The problem is somewhere else As you can see in msdn the HttpUtility is present in System.Web in framework 4.5 You're probably targeting the Client Profile: target the full framework in Project Properties. or you did not add the rigth using statement using System.Web; or you did not add the...
c#,reference,assemblies,system.web
Right Click References >> then click Add Reference and Under Assemblies click Framework and Search System.Web and check the checkbox and click OK button to add it's reference in your project: You have reference of System.Web now and Now you can use all Types and methods which are under System.Web...
c#,asp.net-mvc-4,.net-assembly,system.web
The issue seems to be with finding the deployed assembly in your bin folder. Check the bin folder - it should contain System.Web.Http.WebHost dll. If this dll is in this folder, check the version by right-clicking the file and then properties. If it isn't 4.0.0.0, then you should deploy version...