visual studio namespace in code behind file

Question

From some time whenever i download the webpages example from the Internet.In code behind file of .aspx page there is namespace mention before public partial class in some example.But it never worked for me. I'm using the vs2010 is this format used in previous version of Visual site and why vs2010 not support them.

Like in code behind file

namespace AutoCompleteTextBox
{
     public partial class AutoCompleteDemp : System.Web.UI.Page

Answer 1

Make sure your .aspx 's <@page> directive has a matching Namespace:

<%@ Page Title="Contact" Language="C#" AutoEventWireup="true" 
     CodeBehind="AutoCompleteDemp.aspx.cs" Inherits="AutoCompleteTextBox.AutoCompleteDemp " %>