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I haven't used it but basically it's a "real time" communication technology for communicating between the client (javascript, silverlight, .NET) and ASP.NET. Currently there are 3 methods for "real time" communication (think chat application): polling, long polling, and HTML5 WebSockets. SignalR adds an abstraction layer and leverages all 3 of these methods depending on browser support and context. Here's an article describing the 3 methods (and how SignalR helps): <a href="http://blog.maartenballiauw.be/post/2011/11/29/Techniques-for-real-time-client-server-communication.aspx" rel="noreferrer">http://blog.maartenballiauw.be/post/2011/11/29/Techniques-for-real-time-client-server-communication.aspx</a> And here's an article from Hanselman (and a functioning demo!) on how to use it: <a href="http://www.hanselman.com/blog/AsynchronousScalableWebApplicationsWithRealtimePersistentLongrunningConnectionsWithSignalR.aspx" rel="noreferrer">http://www.hanselman.com/blog/AsynchronousScalableWebApplicationsWithRealtimePersistentLongrunningConnectionsWithSignalR.aspx</a> Another: <a href="http://jordanwallwork.co.uk/2011/10/signalr/" rel="noreferrer">http://jordanwallwork.co.uk/2011/10/signalr/</a> A Hub is a class used for the communication. In javascript you can use a hub like this: <pre><code>$(function() { var myConnection = $.connection.myHub; $.connection.hub.start(); }); </code></pre> In ASP.NET you do this: <pre><code>public class Chat : Hub { public void Distribute(string message) { Clients.receive(Caller.name, message); } } </code></pre> Both of those snippets were taken from the links referenced above.
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