Drago Manolescu post an intresting article in his blog about Ajax patterns in C#3.0. This article contains sopme useful information about using Ajax patterns and some new Microsoft technologies like Volta. Here's a small exerpt from this article containg one of the example:

«.NET developers using Volta have several options for implementing Ajax patterns. Consider Display Morphing, a pattern that allows applications to update display elements dynamically, without postbacks and full page redraws. This entails altering the style of DOM elements. Here's a C# snippet from a Volta application that shows or hides a DOM element as the mouse enters or leaves a <div>:

div.MouseEnter += delegate

{

messageDiv.Style.Display = "block";

};

div.MouseLeave += delegate

{

messageDiv.Style.Display = "none";

};»

The full version of this article with other examples you can find in Dragos Manolescu's (work) blog