Creating A Template Item From A Web Form And Auto Generating The Inherits Page Directive?

OK, so I'm trying to create a template item from a web form.

I have referenced this article: [URL] and it exports the template and installs it fine.

When you try and use the template item within a project though it leaves the inherits="_Default" in the page directive like shown below:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="FormTemplateDev.aspx.cs" Inherits="_Default" %>

So it thinks all the new template items use the original form name pre-template generation. This is an issue in the code behind too as shown here:

public partial class _Default : System.Web.UI.Page

I have seen example of passing paramater strings through but havent managed to get anything to compile. I found something like below:

public partial class $safeitemname$ : System.Web.UI.Page

This was the link to the list of available template parameters i found:

Project Template Parameters