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I have a User that can have collection of users he likes... Another user can have collection of users he likes.... If User A likes User B and if User B likes User A, then they get to hang out. I need to send each other their contact info. How do we represent such a model in Entity Framework Code First? public class User { public int UserId { get; set; } public int? UserLikeId { get; set; } public virtual UserLike UserLike { get; set; } } public class UserLike { public int UserLikeId { get; set; } public int UserId { get; set; } public virtual User User { get; set; } public virtual ICollection<User> LikeUsers { get; set; } } Is this model correct? I can't get this to work. I've tried another way but that doesn't work too... I tried to add collection of user to user table. For ex : public virtual ICollection<User> userlike { get; set; } public class User { public int UserId { get; set; } public virtual ICollection<UserLike> UserLikes { get; set; } } public class UserLike { public int UserLikeId { get; set; } public int UserId { get; set; } public virtual User User { get; set; } public int LikeUserId { get; set; } public virtual User LikeUser { get; set; } } I get this error when I try to add user and who they like: Conflicting changes to the role 'UserLike_LikeUser_Target' of the relationship 'UserLike_LikeUser' have been detected. What's the best way to represent such a model?

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