Map tables using fluent api in asp.net MVC5 EF6?

Question

I am trying to add profile/Membership information into my MVC5 application and adding configuration mappings.

I get the following error message:

Answer 1

Follow these steps around OnModelCreating method and test after each one to be aware of taking effect:

1. Make sure you have one Context to prevent of their rule conflicts.
2. Call base.OnModelCreating(modelBuilder); inside the mentioned method (first of all)
3. Add the followings plus previews step in the method:

modelBuilder.Entity().HasKey(l => l.UserId);
modelBuilder.Entity().HasKey(r => r.Id);
modelBuilder.Entity().HasKey(r => new { r.RoleId, r.UserId });