using System;

using System.Threading;

​

public class ThreadWithState

{

    private string boilerplate;

    private int numberValue;

​

    private ExampleCallback callback;

​

    public ThreadWithState(string text, int number, ExampleCallback callbackDelegate)

    {

        boilerplate = text;

        numberValue = number;

        callback = callbackDelegate;

    }

​

    public void ThreadProc()

    {

        Console.WriteLine(boilerplate, numberValue);

        if (callback != null)

            callback(1);

    }

}

​

public delegate void ExampleCallback(int lineCount);

​

public class Example

{

    public static void Main()

    {

        ThreadWithState tws = new ThreadWithState("This report displays the number {0}.", 42, new ExampleCallback(ResultCallback));

        Thread t = new Thread(new ThreadStart(tws.ThreadProc));

        t.Start();

        Console.WriteLine("Main thread does some work, then waits.");

        t.Join();

        Console.WriteLine("Independent task has completed; main thread ends.");

    }

​

    public static void ResultCallback(int lineCount)

    {

        Console.WriteLine("Independent task printed {0} lines.", lineCount);

    }

}