C#: How can Server.Mappath read a file?

Question

I have a Visual Studio 2008 solution that contains a handful of projects. One project contains a WCF Service I'm deploying. That WCF Service references some code in one of the other projects. That code is trying to read a file that's in a folder in the WCF project. Pseudo-project structure:

Solution
 Project1
  myclass.cs
    string file = Server.Mappath("");


 Project2
  filefolder
    myfile.txt

What is the correct syntax to put in the Mappath? I've tried all different variations such as:

".filefolder/myfile.txt"
"/filefolder/myfile.txt"
"./filefolder/myfile.txt"
"~/filefolder/myfile.txt"

None seem to be able to reach the file. One thing I thought of: Visual Studio 2008 runs the project and WCF in its own sandbox in IIS. Could that be the issue? Would it work if setup and deployed in regular IIS?

Answer 1

var serverPath =
       System.Web.Hosting.HostingEnvironment.MapPath("~/filefolder/myfile.txt");