ASP.NET: Client-side DataSets with Ajax.NET Pro

Everybody loves .NET's DataSets. They provide the most simple yet powerful way to manipulate in-memory tables and data collections on the server-side. Good news for hardcore AJAX web developers: using Michael Schwarz's amazing Ajax.NET Professional library we can unleash the power of server-side DataSets to the client-side using Javascript. Not only that, but we can create a DataSet and populate it on the server, invoke it on the client side, modify it or create a new one and send it back to the server.