Entity Framework Code First: One-to-Many and Many-to-Many relationships to same table

Question

I have a User model and a Event model in my project. The Event has a creator(User) and has participant(Users) so Event has a one-to-many relationship with User and also a many-t

Answer 1

EF doesn't know where User.Events has to be mapped to. It could be Event.CreatedBy or it could be Event.Users. Both would result in a valid model. You must give EF a little hint what you want by applying the [InverseProperty] attribute:

public class User
{
    ...
    [InverseProperty("Users")]
    public virtual ICollection Events { get; set; }
    ...
}