C＃Winforms System.Threading.Timer

Question

I am having trouble with this code being used in multiple window forms:

  private void Window_Load(object sender, EventArgs e)
  {   
     new System.Threading.Timer((state) => 
     { 
         BeginInvoke((Action)delegate() 
         {
             if (!CurrentTimeDate.IsHandleCreated) return;
             CurrentTimeDate.Text = "    " +    DateTime.Now.ToString("hh:mm:ss") + "  " + DateTime.Now.ToShortDateString(); 
         }); 

     }, null, 0, 1000);
  }

When I show the form at first click, it works well, and then I press close button of the window form. I click again the button to show the form again then it shows this error:

InvalidOperationException: Invoke or BeginInvoke cannot be called on a control until the window handle has been created

Edit: I thought it is solved but the code still shows error

Answer 1

I think it's the timer which continue to run, after you're form has been closed. Try save the instance of the timer, and in the Form_Closing event call timer.Dispose()