Ajax promises to be the technology of choice for the next generation of web applications. Performance of web applications is a serious concern and a big challenge to the web application developers. Ajax can be used for building high performance web applications seamlessly. Microsoft's ASP.NET Ajax extensions allow full integration with a programmer's existing ASP.NET sites and apps. And while the basic components of Ajax have been around for a while, using Ajax well presents many challenges. In other words, this is a perfect topic for a Sams Teach Yourself book. This is a hands-on book for developers who want to use Ajax for building dynamic and high performance web applications in ASP.NET. You will get to know the practical approach towards buliding such applications with Ajax. This book will start with the basics of Ajax and eventually guide the reader to quickly start implementing ASP.NET applications. It is filled with practical examples and real world code samples that will not only help you learn quickly, but can also be used as is in your own applications.