Making use of ETags in your web application will not only improve the site's perceived speed to the end user, but will also reduce server processing load. Here's how to implement ETags properly in ASP.NET MVC.
Creating a Login Service for an iPhone Application using WCF
Previously, we described how to create a WCF service from scratch that would easily output data from a Windows Communication Foundation (WCF) service. In this article, we'll show you how to send data the other way - from the iPhone to a WCF service.