Micor thread with yield of C#.

Micro thread is called co-routine or fiber.
It is possible to implement micro thread by using yield.

class Program
{
    static void Main(string[] args)
    {
        var microThread1 = MicroThread1();
        var microThread2 = MicroThread2();
        var microThread3 = MicroThread3();

        Console.WriteLine("Begin");

        microThread1.MoveNext();
        microThread2.MoveNext();
        microThread3.MoveNext();
        microThread1.MoveNext();
        microThread2.MoveNext();
        microThread3.MoveNext();

        Console.WriteLine("End");

        Console.ReadLine();
    }

    static IEnumerator<object> MicroThread1()
    {
        Console.WriteLine("Mocro Thread 1-1");
        yield return null;
        Console.WriteLine("Mocro Thread 1-2");
        yield return null;
        Console.WriteLine("Mocro Thread 1-3");
        yield return null;
    }

    static IEnumerator<object> MicroThread2()
    {
        Console.WriteLine("Mocro Thread 2-1");
        yield return null;
        Console.WriteLine("Mocro Thread 2-2");
        yield return null;
        Console.WriteLine("Mocro Thread 2-3");
        yield return null;
    }

    static IEnumerator<object> MicroThread3()
    {
        Console.WriteLine("Mocro Thread 3-1");
        yield return null;
        Console.WriteLine("Mocro Thread 3-2");
        yield return null;
        Console.WriteLine("Mocro Thread 3-3");
        yield return null;
    }
}