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Cannot implicitly convert type 'System.Data.EntityState' to 'System.Data.Entity.EntityState'. An explicit conversion exists(are you missing a cast?) (2)

When you are using EF 6 or moving from EF 5 to EF 6, you should use System.Data.Entity.EntityState instead of System.Data.EntityState. This error happens when your project has reference to EF6 but you have code for EF5.

Also, check this link: When upgrading from EF5 to EF6 should I replace System.Data.Objects?.

I am getting this error in asp.net when using Entity Framework : "Cannot implicitly convert type System.Data.EntityState to System.Data.Entity.EntityState. An explicit conversion exists (are you missing a cast?)"

Here is the snippet:

foreach (OrderLine line in order.OrderLines)
    context.Entry(line.Product).State = System.Data.EntityState.Modified;

Please suggest what should I do to resolve the error.

Your code must be like this:

if (ModelState.IsValid)
    db.Entry(movie).State = System.Data.Entity.EntityState.Modified;
    return RedirectToAction("Index");
return View(movie);