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        private async void button1_Click(object sender, EventArgs e)
        {
            var t = Task.Run<int>((() => {
                for (int i = 0; i < 10; i++)
                    Thread.Sleep(1000);
               return 42;
            }));

            textBox1.Text = "Ich tue was ...";

            textBox1.Text = (await t).ToString();
        }                    

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 private void Form1_Load(object sender, EventArgs e)
        {
            Timer t1 = new Timer(); //Timer erstellen
            t1.Interval = 500;  //Timer Zeit in ms
            t1.Tick += new EventHandler(t1_Tick);   //Event erzeugen wenn Timer abgelaufen
            t1.Start();

         }

private void t1_Tick(object sender, EventArgs e)
        {
          
            client_automatic();
         }

private void client_automatic()

//routine um den wert "auswahl" aus SQL-Datenbank zu erhalten

switch (auswahl)
{
   case 0:
   if (initialized == true)
                            {
                                new System.Threading.Thread(new System.Threading.ThreadStart(SQL_WriteNewData)).Start();
                            }
    break;
   default:
   break;
}                    

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if (autoDisabled == false)
            {
                autoDisabled = true;
                System.Threading.Thread test = new System.Threading.Thread(client_automatic);
                test.Start();
            }