ASP.NET File Types : File types « ASP.Net Instroduction « ASP.NET Tutorial

1. ASP.NET Tutorial
2. ASP.Net Instroduction
3. File types

File Name             Description
Ends with .aspx       ASP.NET web pages. 
                      They contain the user interface. 
                      Users request or navigate directly to one of these pages to start your web application.

Ends with .ascx       ASP.NET user controls. 
                      User controls are similar to web pages, except that the user cannot access these files directly. 
                      
Ends with .asmx       ASP.NET web services collections of methods. 

web.config            XML-based configuration file for your ASP.NET application. 
                      It includes settings for customizing security, state management, memory management, and much more. 
                      
Global.asax           Global application file. 
                      To define global variables and react to global events.
                      
Ends with .cs         code-behind files that contain C# code. 

Ends with .vb         code-behind files that contain VB code.