• New feature - Added FromObject to JObject, JArray for creating LINQ to JSON objects from regular .NET objects.
• New feature - Added support for deserializing to an anonymous type with the DeserializeAnonymousType method.
• New feature - Support for reading, writing and serializing the new DateTimeOffset type.
• New feature - Added IsoDateTimeConverter class. Converts DateTimes and DateTimeOffsets to and from the ISO 8601 format.
• New feature - Added JavaScriptDateTimeConverter class. Converts DateTimes and DateTimeOffsets to and from a JavaScript date constructor.
• New feature - XmlNodeConverter handles serializing and deserializing JavaScript constructors.
• New feature - Ability to force XmlNodeConverter to write a value in an array. Logic is controlled by an attribute in the XML, json:Array="true".
• New feature - JsonSerializer supports serializing to and from LINQ to JSON objects.
• New feature - Added Depth property to JsonReader.
• New feature - Added JsonTextReader/JsonNodeReader and JsonTextWriter/JsonNodeWriter.
• Change - More concise LINQ to JSON querying API.
• Change - JsonReader and JsonWriter are now abstract.
• Change - Dates are now serialized in a JSON complient manner, similar to ASP.NET's JavaScriptSerializer or WCF's DataContractJsonSerializer.
• Change - JsonSerializer will serialize null rather than throwing an exception.
• Change - The WriteTo method on LINQ to JSON objects now support JsonConverters.
• Fix - JsonTextReader correctly parses NaN, PositiveInfinity and NegativeInfinity constants.
• Fix - JsonSerializer properly serializes IEnumerable objects.
• Removed - AspNetAjaxDateTimeConverter. Format is no longer used by ASP.NET AJAX.
• Removed - JavaScriptObject, JavaScriptArray, JavaScriptConstructor. Replaced by LINQ to JSON objects.