class InternalClass{    Thread t = null;    public InternalClass()  {
        t = new Thread( new ThreadStart( ThreadFunction ) );                    t.Start();  }
    /// Internal Thread Function    private void ThreadFunction()   {
        // Simulate startup     Thread.Sleep( 10000 );
        Console.WriteLine( "ThreadFunction Startup Complete trying to call lock(this)" );
        // loop forever     while( true )       {           lock(this)          {
                Console.WriteLine( "Running Internal ThreadFunction - Starting(takes 3 seconds)" );
                                // do some work             Thread.Sleep( 3000 );
                Console.WriteLine( "Running Internal ThreadFunction - Complete" );          }       }   }}