WebFullDuplex is an ASP.NET server control to provide AJAX functionality for your web applications. This control allows you to make web pages more responsive by exchanging data with the server behind the scenes. Thus it gives you advantages listed below: 1. Dramatically lesser number of hits to the server 2. Traffic savings (cost effective) 3. Increasing the downloads speed 4. Improved usability 5. The exact reaction to the event Main features: 1. Callback Result - Returns callback result to a client-side function instead of rendering. 2. Callback Error - Returns callback error to a client-side function for exception handling. 3. Auto Callback - Initiates callbacks automatically at specified intervals in milliseconds. 4. Server Initiation - Data transfer initiated by server. 5. Down Level Browser Support - Handles callback requests as regular postbacks when XmlHttp is not supported. 6. Client-Side API - Initiates callback requests and pass arguments to the server. and more