This post walkthrough of how to use your existing ASP.NET skills to build cloud services and applications. It's possible to build Windows Azure apps with Visual Studio 2008 or Visual Studio 2010, but VS 2010 gets you out of gate faster. If you're interested in using VS 2008, much of the content is applicable, but you'll need to download Windows Azure Tools for Microsoft Visual Studio. If you’ve VS2010 installed, then we're ready to get started. Cloud Tools team has made every effort to make experience of building a cloud app as similar as possible to building an ASP.NET app. The first thing we're going to do is get VS set up to build these types of apps. Simply click on File | New Project, select Visual C# or Visual Basic top-level nodes, and find Cloud node that appears in Installed templates pane on right. Once selected you'll see only a single project template that says "Enable Windows Azure Tools." Go ahead and double-click that template; name and location that you choose don't matter in this case. You'll end up with an HTML document opened in a tab, which provides instructions on downloading Windows Azure Tools.
Full Article: Cloud Development in Visual Studio 2010