How to handle JSON in C#?

var jss = new JavaScriptSerializer();
var data = jss.Deserialize<dynamic>(jsonString);

Don't forget to reference "System.Web.Extensions"

See

http://msdn.microsoft.com/en-us/library/system.runtime.serialization.json.datacontractjsonserializer.aspx

Basically you can use the 'data contract' model (that's often used for WCF XML serialization) for JSON as well. It's pretty quick and easy to use standalone for little tasks, I have found.

Also check out this sample:

http://msdn.microsoft.com/en-us/library/bb943471.aspx

There's the DataContractJsonSerializer class.

Deserialize:

DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(MyObject));
Stream s = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(json_string));
MyObject obj = ser.ReadObject(s) as MyObject;

Serialize:

DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(MyObject));
Stream s = new MemoryStream();
MyObject obj = new MyObject { .. set properties .. };
ser.WriteObject(s, obj);
s.Seek( SeekOrigin.Begin );
var reader = new StreamReader(s);
string json_string = reader.ReadToEnd();

DataContractJsonSerializer for serializing to/from objects.

In Silverlight 3, there's System.Json (http://msdn.microsoft.com/en-us/library/system.json(VS.95).aspx), very handy.