MVC会员问题 – C#,EntityFramework

错误是：

EntityType 'MembershipUser' has no key defined. Define the key for this EntityType.

EntitySet "MembershipUsers" is based on type "MembershipUser" that has no keys defined

我已经设置了标准的asp.net会员资格,但增加了一个额外的表格&名为UserDetails的模型,其中外键是aspnet_Users中的UserId字段.

一旦将条目插入到users表中,我就会获得UserId并尝试在Useretails表中输入其他详细信息,但这就是出现这些错误的时间.这是其他相关代码. AccountController：

if (createStatus == MembershipCreateStatus.Success)
            {                    
                //Add other user details
                UserRepository _user = new UserRepository();
                UserDetails userDetails = new UserDetails();

                userDetails.EmployeeNumber = Request.Form["EmployeeNumber"];
                userDetails.Title = Request.Form["Title"];
                userDetails.FirstName = Request.Form["FirstName"];
                userDetails.Initials = Request.Form["Initials"];
                userDetails.Surname = Request.Form["Surname"];
                userDetails.Nino = Request.Form["Nino"];

                _user.AddUserDetails(userDetails,model.Email);
                return RedirectToAction("Welcome","Home");
            }

UserRepository：

public MembershipUser GetUserByEmail(string email)
    {
        MembershipUser user = Membership.GetUser(email);
        return user;
    }


    public void AddUserDetails(UserDetails userDetails,string email)
    {
        MembershipUser user = GetUserByEmail(email);
        Guid userGuid = (Guid)Membership.GetUser(email).ProviderUserKey;
        userDetails.UserID = userGuid; //Add UserID foreign key
        using (IntranetApplication db = new IntranetApplication())
        {
            db.UserDetails.Add(userDetails);
            db.SaveChanges();
        }
    }

db.SaveChanges行将触发该错误.

由于MemberShip用户本身是一个类而不是实体框架的一部分,有谁知道如何将UserID设置为主键？我已经检查了数据库,它已经设置好了,所以不知道我怎么能在代码中修改它.

谢谢 – 任何帮助表示感谢