While working with AJAX we can make the web page more interactive by introducing the Fade behavior, and we can also introduce the provision of cancellation of async AJAX operation. This is how we can leverage on usability aspect of the application. Matt Berseth has posted a nice article to acheive this behaviour through ASP.Net AJAX, following is the source code. <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %> <%@ Register Assembly="AjaxControlToolkit"...