ASP.NET MVC1 -> MVC3
string path = HttpContext.Current.Server.MapPath("~/App_Data/somedata.xml");
ASP.NET MVC4
string path = Server.MapPath("~/App_Data/somedata.xml");
MSDN Reference:
HttpServerUtility.MapPath Method
string path = HttpContext.Current.Server.MapPath("~/App_Data/somedata.xml");
string path = Server.MapPath("~/App_Data/somedata.xml");
MSDN Reference:
HttpServerUtility.MapPath Method