namespace System.Data.Entity
{
    public class DbSet<TEntity> : DbQuery<TEntity>, IEnumerable, IEnumerable<TEntity>, IDbSet<TEntity>, IQueryable, IQueryable<TEntity>
        where TEntity, class
    {
        public virtual TDerivedEntity Create<TDerivedEntity>()
            where TDerivedEntity, class, TEntity;
    }
}