using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

            IEnumerable<int> GetDependencyGraphWithSkipToNext()

            {

                var DependencyGraph = Enumerable.Range(0, 20);

                HashSet<int> pendingTypes;

                void refreshPendingTypes(int i)

                {

                    Console.WriteLine("refreshing: " + i);

                    pendingTypes = Enumerable.Range(0, ++i).ToHashSet();

                }

​

                refreshPendingTypes(1);

                foreach (var type in DependencyGraph.Where(z => pendingTypes.Contains(z)))

                {

                    Console.WriteLine(type);

                    yield return type;

                    refreshPendingTypes(type+1);

                }

            }

        GetDependencyGraphWithSkipToNext().ToArray();

    }

}