Many to many inserting values ito DB in Ado.net entity frame

Hi All,

Could you please help me on this.

i have in Ado.net entity framwork relation like this 

     modelBuilder.Entity()

                  .HasMany(u => u.Roles)

                  .WithMany(r => r.Permissions)

                  .Map(mapTable => mapTable.MapLeftKey("PERMISSION_ID")

                      .MapRightKey("ROLE_ID")

                      .ToTable("ROLE_PERMISSIONS", schema_name));

here while saving role object inserting PERMISSION_ID,Role_ID from role object and primarykey value from Sequence now i want remove the Sequence in DB and insert through code how can i do this please help me on this.

Thanks & Regards,

Narasimha