System.Web.HttpContext unavailable in a service class library

I encountered this recently. I have a service that implements an aggregate interface. Each interface is implemented in a seperate class library. I needed access to System.Web.HttpContext in one of my projects. When I tried to add a reference to the System.Web namespace I did not see this namespace listed in the list of available namespaces. Intrigued I checked my project properties and saw that the project was referencing .Net Client Profile of .Netfrx40. I changed this to the full .Netfrx40 and tried adding the reference again and VOILA I was able to add the namespace reference to my project and now have access to HttpContext.

Happy Coding!