public bool IsValid(HacForoContainer db, ModelStateDictionary modelState) { bool isValid = true; if (db.UserSet.Where(u => u.Email == Email).Count() != 0) { modelState.AddModelError("Email", "There is already a User with that Email"); isValid = false; } if (db.UserSet.Where(u => u.UserName == UserName).Count() != 0) { modelState.AddModelError("UserName", "There is already a User with that User Name"); isValid = false; } return(isValid); }