C#

<br />
private void Startbtn_Click(Object sender, EventArgs e)<br />
{<br />
  Thread t = new Thread(new ThreadStart(try));<br />
  t.Start()<br />
}<br />
<br />
void try()<br />
{<br />
  int count = 0;<br />
  while (true)<br />
  {<br />
    if(count > 1000)<br />
    {<br />
      break;<br />
    }<br />
    Thread.Sleep(1000);<br />
    if(InvokeRequired)<br />
    Invoke(new new_try_delegate(new_try));<br />
    count++;<br />
  }<br />
}<br />
<br />
 public delegate void new_try_delegate();<br />
<br />
 void new_try()<br />
 {<br />
  textBox1.Text += "This is new Thread" + Environment.NewLine;<br />
 }<br />
<br />
<br />

public delegate void new_try_delegate();
new_try_delegate newTryEvent = new new_try_delegate(new_try);

public void new_try()
{
   if (this.InvokeRequired)
   {
      Invoke.Begin( newTryEvent );
   }
   else
   {
      textBox1.Text += "This is new Thread" + Environment.NewLine;
   }
}