using System;
using System.Threading;

public class Writer
{
    string m_name;
    int m_sleep;

    public Writer(string name, int sleep)
    {
        m_name = name;
        m_sleep = sleep;
    }

    public void Write()
    {
        while (true)
        {
            Console.Write(m_name);
            Thread.Sleep(m_sleep);
        }
    }
}

public class SimpleThreadTester
{
    public static int Main()
    {
        Writer A = new Writer("A", 1);
        Writer B = new Writer("B", 100);

        Thread tA = new Thread(new ThreadStart(A.Write));
        Thread tB = new Thread(new ThreadStart(B.Write));

        tA.Start();
        while (!tA.IsAlive)
            ;

        tB.Start();
        while (!tB.IsAlive)
            ;

        Thread.Sleep(10000);

        tA.Abort();
        tA.Join();
        Console.WriteLine(System.Environment.NewLine + "tA has finished");

        Thread.Sleep(50);

        tB.Abort();
        tB.Join();
        Console.WriteLine(System.Environment.NewLine + "tB has finished");

        return 0;
    }
}