Cannot resolve Symbol ObjectStateManager
I have getting an Error of " Cannot Resolve Symbol ObjectStateManager " when trying to call it on my Database context from Entity Framework 4. I can't find anyone else having this issue. I have tried using System.Data and System.Data.Objects . Is there a specific Entity Framework that needs to be made in order to use the ObjectStateManager? Or Am I missing some sort of install package? I am using Database First Entity Framework. Here is the code it is giving my error: (Line 7) [HttpPost] public ActionResult EditProfile(User user) { if (ModelState.IsValid) { db.Users.Attach(user); db