using System;

using System.Linq;

​

public class Program

{

    class Foo

    {

        static int counter;

        public int Id;

        public Foo()

        {

            Id = counter++;

        }

    }

    public static void Main()

    {

        var src = Enumerable.Range(1, 10).Select(_ => new Foo());

        var sorted = src.OrderBy(_ => _.Id % 2).ThenBy(_ => _.Id % 4);

        Console.WriteLine(string.Join(";", sorted.Select(_ => _.Id)));

    }

}