Earlier today, I blogged about a reusable behavior extension to make debugging Silverlight apps a little easier. I wrote most of that article months ago and in the meantime I've added a second behavior extension to support Silverlight software development. I included it with the download, but some explanation about its purpose might be in order.

If you're used to debugging ASP.NET web applications together with WCF services, you will know that Visual Studio automatically attaches the debugger to the service process in addition to the website. When you It doesn't do this for services being called from Silverlight. Instead, Visual Studio will probably warn you that the service call will fail, but we've taken care of that problem with the behavior extension from the previous post.

The solution is fairly obvious: you will have to make sure that the debugger is attached to both your web application and your service.

If you've ever developed a Silverlight web application in conjunction with WCF services, you have probably run into some challenges when it comes to debugging the solution as a whole. Silverlight applications are limited to using services from the same server and port number as the application itself, unless the service explicitly allows external access through a clientaccesspolicy.xml file.