Routing is not working in WCF Rest service with Global.asax

Question

Hi All 

 

I am writing the WCF rest service in .net 3.5, i want to implement routing in Global.asax file  the following code is not working for me can any one help me on this.

 protected void Application_Start(object sender, EventArgs e) 

   {  

               RouteTable.Routes.Add(new ServiceRoute("api/wopi/files", new WebServiceHostFactory(), typeof(RESTSerivce)));                      }

 

It is throwing  compilation error but the same code is working fine with .net framework 4.0 

please help me on this .