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        [STAThread]
        static void Main()                    

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            string str = System.Windows.Forms.Clipboard.GetText();                    

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                ThreadPool.QueueUserWorkItem(klasse.aufruf, streamreader.ReadLine());                    

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                Thread thread = new Thread(new ParameterizedThreadStart(klasse.aufruf));
Thread.Start(sr.ReadLine());                    

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Klasse klasse = new Klasse();
            StreamReader sr = new StreamReader(pfad);
            while (sr.EndOfStream == false)
            {
                Thread thread = new Thread(new ParameterizedThreadStart(klasse.aufruf));
                thread.Start(sr.ReadLine());
            }                    

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            Timer timer = new Timer(wartezeit);
            timer.Elapsed += new ElapsedEventHandler(OnTimedEvent);
            timer.Enabled = true;                    

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timer.SynchronizingObject = this;                    

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             System.Windows.Forms.Timer timer = new System.Windows.Forms.Timer();
            timer.Interval = 1000;
            timer.Tick += new EventHandler(OnTimedEvent);
            timer.Enabled = true;
            timer.Start();
        }

        void OnTimedEvent(object source, EventArgs e)
        {
[...]
}