KCallback.net Control, the most powerful, robust, callback control available in the market today for ASP.NET with AJAX support. Written in 100% managed C# code, KCallback.net provide callback functionality in your web applications. The KCallback.net control allows developers to AJAX-enable any ASP.NET application with writing a few lines of code. It allows to update page content without postback and loss of scroll position Here is the list of general features of KCallback.net: AJAX Save State Callback Result Callback Error Override Output Loading Display Enable Caching MultiArgument Auto Callback User Control Down Level Browser Support Client-Side API Server-Side API Before and After execute client side event handler XHTML Compliance