System.Threading.ThreadStateException was unhandled (c#)

This problem occurs when you add some active control like web browser.I added web browser in some panel and tried to run the application, it says

"System.Threading.ThreadStateException was unhandled"

Solution:-

So just add [STAThread] above the main function where you instantiate the class.
e.g.(c#)
[STAThread]
static void Main()
{
Application.Run(new Parent_Form());
}


Useful Links:-

1. http://support.microsoft.com/kb/841295
2. http://www.gamedev.net/community/forums/topic.asp?topic_id=264874
3. http://blogs.msdn.com/adam_nathan/archive/2003/07/18/56727.aspx