Re: customize visual web developer

I have figured his out. Go to VWD options. Select show all options. Look for
extensions in editor. Add the desired extension and select webform editor. Now
VWD will treat the file with this extension as a aspx page.

You also need to change web.config settings. Changing editor association in VWD
does not change ASP.NET runtime configuration. Therefore ASP.NET will not
process html files as aspx at runtime unless you also properly specify it in
web.config.