Web pages and ASP.NET are a wonderful tools, but as the old proverb goes, "if all you have is a hammer, everything seems like a nail". ASP.NET is a web technology, all of which exists to serve up resources to Web Browsers which request them. Thats great, and it works for the vast majority of things currently on the internet. In fact, when people think of the internet, they mostly associate it with the ubiqitous world wide web model or its HTTP protocol. But what if we want more...what if instead of Web Browsers just requesting resources, we want to push information actively out to them, without being asked first.
