using System;
using System.Threading;

class Program {
  public static void DoWork() {
     Console.WriteLine("Child thread starts");
     
     Console.WriteLine("Child thread goes to sleep");
     Thread.Sleep(5000); // the thread is paused for 5000 milliseconds
     Console.WriteLine("Child thread resumes and finishes");
  }
  
  public static void Main(string[] args) {
     ThreadStart childJob = new ThreadStart(DoWork);
     Console.WriteLine("Main thread starts");
     
     Thread childThread = new Thread(childJob);
     childThread.Start();

     Console.WriteLine("Main thread waiting");
     childThread.Join();
     Console.WriteLine("Main thread finishes");
  }
}