C# Help

Having an issue using
>http://msdn.microsoft.com/en-us/library/ydby206k.aspx
and not sure how to incorporate this fix
>http://msdn.microsoft.com/en-us/library/system.stathreadattribute.aspx#Y0

Here's a post to my source code
>http://pastebin.com/10zj97RQ

I'm trying to get it to copy the final result into the user's clipboard, but I keep hitting the ThreadStateException

The program is completely functional, I'm having an issue getting one line to work, that being line 248

Clipboard.SetText(finalText);

due to said exception above