u can set page language as u want.. 

if the code is written in the vb.net den i makes some error if u change the language.. 

The best and convinent method for beginers to change the page language is that u can add new item into ur project den u can add some class nd at the bottom of the page u can check the default language from the drop down list...

another way for change the default language in web based application is that u can enter the following code in the top of ur aspx file

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Your Code File.aspx.cs"  %> 

if u can ask some more thing den ask me freely 

if this post help u out kindly mark this as Answer

Regardz

Deadlykill3r

thanks, but not what i'm looking for. again, i have a random, isolated web form (aspx) page with no <% page language %> specified. also no language specifield for the server script block in the page (no code file). apparently visual web dev defaults to vb when nothing is specified. i want it to default to c# for everything web. web forms, user controls, asax files, whatever.

If page has no language specific, VB is assumed. ASP.NET has a way to specify default language in web.config, but VWD does not support this specification. In other words, you have to specify language in the page directive.