How can I direct debug output to a text file

You need to add a Trace Listener to your code. Below is sample code that adds a TextWriterTraceListener (and don’t forget the Flush before you terminate). For more information on tracing in general, look for the topic ‘Tracing Code in an Application’ in your online .NET documentation.

	//set up the listener...
	System.IO.FileStream myTraceLog = new  System.IO.FileStream(@'C:\myTraceLog.txt',  System.IO.FileMode.OpenOrCreate);
	TextWriterTraceListener myListener = new TextWriterTraceListener(myTraceLog);
	..........
	//output to the instance of your listener
	myListener.WriteLine( 'This is some good stuff');
	...........
	//flush any open output before termination... maybe in an override of your form’s OnClosed
	myListener.Flush();