-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
-Changed collection type on JsonArrayContract to public
-Changed dictionary key type and dictionary value type on JsonDictionaryContract to public
-Fixed error handling when failing to parse array content
-Fixed error handling when there are missing required 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 Required.Always attribute validation when writing JSON as well reading
-Added TypeNameHandling.Auto to automatically write the type name when a value doesn't match the declared type
-Fixed reading multi-byte strings in BSON
-Added WriteObjectId to BsonWriter
-Added BsonObjectId and BsonObjectIdConverter classes
-Added KeyValuePairConverter
-Added DynamicCodeGeneration flag to DefaultContractResolver
-Changed JsonConverter.ReadJson to add an extra parameter: currentValue
-Added BsonReader, BsonWriter
-Added support for reading and writing byte arrays to JsonReader, JsonWriter and LINQ to JSON classes
-Added ReadAsBytes to JsonReader
-Changed Silverlight build serializer to look for a TypeConverter
-Changed .NET build to not rely on System.ComponentModel.DataAnnotations assembly to support .NET 4.0 client profile
-Remove DateTimeOffset stand-in from Compact Framework build
-Fixed .NET 2.0 build to run on environments without .NET 2.0 SP1
-Fixed deserialization to always use a new value created from a JsonConverter
-Fixed XmlNodeConverter to support converting comments in JSON
-Added IValueProvider, ReflectionValueProvider, DynamicValueProvider
-Added Dynamic.snk
-Added Required enum with options Default, AllowNull and Always
-Added serialization event support to Silverlight version
-Added Converter to JsonProperty for JsonConverter
-Changed IsRequired to Required enum
-Changed schema generator to allow for Required enum options
-Changed Silverlight project version to Silverlight 3
-Improved error message when JSON array encountered for object and vice-versa when deserializing
-Improved error message for converting types when deserializing
-Improved error message from getting and setting properties when serializing and deserializing
-Fixed empty string being converted to null when deserializing
-Removed dependency on Entity Framework and LINQ to SQL assemblies
James Newton-King