How to run two threads parallel?

Question

I start two threads with a button click and each thread invokes a separate routine and each routine will print thread name and value of i.

Program runs

Answer 1

They are running in parallel. Here is adjusted code to see it better:

    private void test()
    {
        Thread tid1 = new Thread(new ThreadStart(Thread1));
        Thread tid2 = new Thread(new ThreadStart(Thread2));

        tid1.Start();
        tid2.Start();
        Console.Write(string.Format("Done"));

    }
    static void Thread1()
    {
        for (int i = 1; i <= 10; i++)
        {
            Console.Write(string.Format("Thread1 {0}", i));
            Thread.Yield();
        }
    }

    static void Thread2()
    {
        for (int i = 1; i <= 10; i++)
        {
            Console.Write(string.Format("Thread2 {0}", i));
            Thread.Yield();
        }
    }

And here is output: DoneThread1 1Thread2 1Thread1 2Thread2 2Thread1 3Thread2 3Thread1 4Thread2 4Thread1 5Thread2 5Thread1 6Thread2 6Thread1 7Thread2 7Thread1 8Thread2 8Thread1 9Thread2 9Thread1 10Thread2 10