open html page in new window using C#?

[GoldenShiner]

hello,
I have a c# application which after clicking a button in infopath form, creates an HTML file. I would like to open this page in a NEW window, instead of what is actually doing, opening into under a tab. Any help will be greatly appreciated.
<code>

  fileName = ("Warningfile " + PHYS_MSTR_water_body_id.ToString() + " " + PHYS_MSTR_event_date.ToString() + " " + time_collected_hh.ToString() + " " + time_collected_minutes.ToString() + " " + PHYS_LOC_grid.ToString() + ".html");
            FileStream outputfile = null;                                                          path = "Warningfile " + PHYS_MSTR_water_body_id.ToString() + " " + PHYS_MSTR_event_date.ToString() + " " + time_collected_hh.ToString() + " " + time_collected_minutes.ToString() + " " + PHYS_LOC_grid.ToString() + ".html";   
            try
            {                             
                outputfile = new FileStream(fileName, FileMode.Create, FileAccess.Write);                              
               writer = new StreamWriter(outputfile);
               writer.BaseStream.Seek(0, SeekOrigin.End);
                            DoWrite("<a><target='_blank'></a>");
                DoWrite("<HTML>");
                DoWrite("<HEAD>");
                DoWrite("<TITLE>");...

</code>

[tlhintoq]

TIP: When you are writing your question, there is a button on the tool bar that wraps the [code] tags around your copy/pasted code. It helps a bunch. Its the button with a '#' on it. More on tags. They're cool. Check'em out.

Tags in the forms are in brackets.
[code] not <code>

[GoldenShiner]

oh, sorry about that, and thanks.