object reference not set to an instance of an object

I'm getting the next exception:

object reference not set to an instance of an object

In the next code:

foreach (Control ctl in ActiveForm.Controls)
{
      if (ctl.GetType() == typeof(TextBox))
   {
      ctl.Text = string.Empty;
   }
}

This is happening in Ubuntu 10.04 + Mono 2.8, in Windows Server 2008 + Mono
2.8 this is working fine.

Since in Ubuntu it doesn't tell me line where it's happening, I'm not sure
what's the problem.

Any ideas?

-- 
View this message in context: http://mono.1490590.n4.nabble.com/object-reference-not-set-to-an-instance-of-an-object-tp3019792p3019792.html
Sent from the Mono - WinForms mailing list archive at Nabble.com.
_______________________________________________
Mono-winforms-list maillist  -  [email protected]
http://lists.ximian.com/mailman/listinfo/mono-winforms-list