Property name in a type must be unique

Question

I am using Entity Framework 5 and I have the following entities:

public class User {
  public Int32 Id { get; set; }
  public String Username { get; set; }    
          


        

Answer 1

In addition to Slauma's answer

HasForeignKey is not available for 1:1, if you still need it you can simply use WithMany without parameters

HasRequired(x => x.User).WithMany().HasForeignKey(x => x.Id);
HasRequired(x => x.City).WithMany().HasForeignKey(x => x.CityId);