-Changed serializing ISerializable types under partial trust to error to fix security issue
-Fixed LinqBridge collision error in .NET 2.0 by moving types to a different namespace
-Fixed JObject.Keys error when object has no items
-Added DateTimeZoneHandling to control reading and writing DateTime time zone details
-Added reader/writer specific Formatting, DateFormatHandling and DateTimeZoneHandling to JsonSerializerSettings
-Added feature of reader/writer specific settings to be set on JsonReader/JsonWriter when serializing
-Added ReadAsDate to JsonReader
-Added ReadAsString to JsonReader
-Changed JsonTextReader to automatically read ISO strings as dates
-Refactored ReadAsXXX methods and reduce code redundancy
-Removed unused JsonDateTimeSerializationMode
-Changed JsonReaders to set TokenType to JsonToken.None after finishing content
-Changed the ReadAsXXX methods to return null instead of throwing an error when there is no content
-Improved JsonSerializer to cache contract/converters where possible to improve performance
-Improved JsonTextReader error message when additional JSON content found
-Fixed internal exception thrown when deserializing Decimal/DateTimeOffset/Byte lists
-Fixed various JsonTextReader bugs
-Fix boolean values sometimes being capitalized when converting to XML
-Fix error when deserializing ConcurrentDictionary
-Fix serializing some Uris
-Change KeyValurPairConverter to not rely on the order of the key and value properties
-Fixed JObject loading JSON with comments
-Fixed error when using a Specified property with no setter
-Fixed transient constructor error on Windows Phone 7
-Fixed deserializing null values into nullable generic dictionaries
-Fixed poor error message when dynamic type cannot be created during deserialization
-Fixed error when setting a null value on a dynamic type during deserialization
-Fixed JsonTextReader.ReadAsDecimal not attempting to convert string values to decimal
-Added IFormattable to JValue
-Changed JValue ToString to call ToString on the internal value
-Fixed code emit error when deserializing interfaces in certain situations
-Added Load and Parse helper methods to JToken
-Fixed performance issues when deserializing with partial type names
-Fixed deserializing certain decimal values on classes with non-default constructors
-Changed .NET 3.5 and .NET 4.0 builds to target client frameworks
-Fixed JSON Schema not raising an error for additional properties when the schema has no properties
-Updated main project to .NET 4.0
-Updated to psake 4.0
-Changed assembly version to 4.0.0.0
-Added ICustomTypeDescriptor implementation to JObject, removed JTypeDescriptionProvider and JTypeDescriptor
-Changed serialization of collections to use iterator rather than indexer
-Removed Compact Framework project
-Fixed XML documentation warnings
-Added TypeNameAssemblyFormat property to JsonSerializer. Property controls whether .NET type names are written with a full or partial assembly name
-Added TypeNameHandling to JsonProperty attribute. Allows a type names to be included on an individual property basis
-Fixed serializing HashSet<T>
-Additional permission demands added to DynamicCodeGeneration flag
James Newton-King