modelBuilder.Entity<UserWishlist>()
                .HasKey(uw => new { uw.UserId, uw.WishListId });

            modelBuilder.Entity<UserWishlist>()
                .HasOne(uw => uw.User)
                .WithMany(uw => uw.WishListsB)
                .HasForeignKey(uw => uw.UserId)
                .OnDelete(Microsoft.EntityFrameworkCore.Metadata.DeleteBehavior.Restrict);

            modelBuilder.Entity<UserWishlist>()
                .HasOne(uw => uw.WishList)
                .WithMany(uw => uw.Buyers)
                .HasForeignKey(uw => uw.WishListId)
                .OnDelete(Microsoft.EntityFrameworkCore.Metadata.DeleteBehavior.Restrict);