Console.WriteLine("Hello World");

It is August and everything in Silverlight world is brand new! The Silverlight 1.0 runtime has updated to Release Candidate, Silverlight 1.1 to an "Alpha Refresh". To write any Silverlight apps, I suggest trying the new "Expression Blend 2 August Preview". To use Visual Studio as Silverlight dev platform, try Microsoft ASP.NET Futures (July 2007) together with Visual Studio 2005 or the brand new Microsoft Visual Studio 2008 Beta 2 plus Microsoft Silverlight Tools Alpha Refresh for Visual Studio (July 2007). Also, don't miss to install the new Silverlight SDKs: Microsoft Silverlight 1.0 Software Development Kit Release Candidate and Microsoft Silverlight 1.1 Software Development Kit Alpha Refresh

I updated my reference Silverlight application from Silverlight 1.0 Beta (April) to Silverlight 1.0 RC and only needed two minor modifications for it to work again:

"Default.htm.js" needed a few modifications as the namespace "Sys.Silverlight" moved to "Silverlight" and event handlers in Silverlight XAML resources don't support the notation "event="javascript:handler"" anymore - which required me to simply remove the "javascript:". Then, the "Silverlight.js" script that is part of every Silverlight application, making sure the Silverlight runtime is installed on the target system, needed to be replaced. That was all.