The link pointed to an old example which was removed when the UI for ASP.Net AJAX suite was extended to provide an AsyncUpload component. However if you need to deploy a Silverlight application in a web project, you can take a look at the Deploy a Silverlight application to a website
tutorial. If you need to implement a more specific scenario using the UI for Silverlight components, please elaborate a bit more on your requirements and we will gladly assist you further.
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