How can I do this in C# modern UI ?
var url = \"http://ajax.googleapis.com/ajax/services/feed/load?q=http%3A%2F%2Fwww.digg.com%2Frss%2Findex.xml&v=1.0\";
I found how to make it work.
I don't know why they did this mess and I don't even understand why but here's the solution:
Right click on project and add reference to:
System.Web.Extensions
than you can add the reference you need with:
using System.Web.Script.Serialization;
and this time it will work. (At least this is what I did on .NET framework 3.5)