10.0.1

• New feature - Added async read support to JsonReader
• New feature - Added async write support to JsonWriter
• New feature - Added async support for loading JObject and JArray
• New feature - Added non-allocating parsing of double and decimal values
• New feature - Added support for TypeConverters to netstandard1.0+
• New feature - Added support for BigInteger to netstandard1.3+
• New feature - Added support for ISerializable to netstandard1.3+
• New feature - Added support for XmlDocument to netstandard1.3+
• New feature - Added support for SerializableAttribute and NonSerializedAttribute to netstandard1.3+
• New feature - Added ISerializationBinder
• New feature - Added SerializationBinder properties to JsonSerializer and JsonSerializerSettings
• New feature - Added TypeNameAssemblyFormatHandling
• New feature - Added TypeNameAssemblyFormatHandling properties to JsonSerializer and JsonSerializerSettings
• New feature - Added support for root object selector in JSONPath filters
• New feature - Added support for multiple names in JSONPath scan filter
• New feature - Added support for any combination of paths and values in JSONPath filter expressions
• New feature - Added support for extension data names to NamingStrategy
• New feature - Added ProcessExtensionDataNames flag to NamingStrategy
• New feature - Added JsonWriter.AutoCompleteOnClose to control whether JSON is auto-completed on JsonWriter.Close
• New feature - Added JsonReaderException constructor with path, line number, line position
• New feature - Added JsonWriterException constructor with path
• New feature - Added JsonReader.SetToken method overload with option not to update position array index
• New feature - Added support for automatically calling single constructor on immutable structs
• Change - Removed .NET 4 portable class library target from NuGet package
• Change - Removed obsolete JsonConverter.GetSchema method
• Change - Removed obsolete constructor from DefaultContractResolver
• Change - Removed obsolete async methods from JsonConvert
• Change - Removed obsolete OnDeserialized, OnDeserializing, OnSerialized, OnSerializing, OnError from JsonContract
• Change - Removed obsolete JsonDictionaryContract.PropertyNameResolver
• Change - Removed obsolete ConstructorParameters, OverrideConstructor, ParametrizedConstructor from JsonObjectContract
• Change - Obsoleted TypeNameAssemblyFormat properties on JsonSerializer and JsonSerializerSettings
• Change - Obsoleted SerializationBinder
• Change - Obsoleted Binder properties on JsonSerializer and JsonSerializerSettings
• Change - Obsoleted FormatterAssemblyStyle in non-full .NET targets
• Change - Obsoleted Newtonsoft.Json.Bson (moved to new NuGet package)
• Change - Improved constructor parameter binding on .NET Core and portable builds
• Change - Improved error when attempting to convert root JSON object property to an XML attribute
• Change - Changed exception thrown when parsing invalid Unicode escape sequence to JsonReaderException
• Change - Changed StringEnumConverter.AllowIntegerValues to also reject reading integer strings
• Change - Changed StringEnumConverter.AllowIntegerValues to also reject writing enum values with no name
• Fix - Fixed JsonTextReader.ReadAsXXX methods not erroring on missing commas between values
• Fix - Fixed error when serializing F# lists with F# 4.1+
• Fix - Fixed StringEnumConverter reading specified enum names that contain a comma
• Fix - Fixed using a TraceWriter with nullable bytes
• Fix - Fixed deserializing null Regex values
• Fix - Fixed deserializing DataTable with error handling
• Fix - Fixed DynamicReflectionDelegateFactory creating typed value type constructors
• Fix - Fixed deserializing with type naming and complex nested generic types
• Fix - Fixed error when converting certain JSON to XML on .NET Core
• Fix - Fixed error handling skipping reading the next object value
• Fix - Fixed date XML precision when converting certain JSON to XML on portable builds
• Fix - Fixed not serializing readonly properties as references if they have corresponding creator parameters
• Fix - Fixed type name being written with nullable structs and TypeNameHandling.Auto
• Fix - Fixed deserializing a duplicate dictionary key from a parameterized constructor
• Fix - Fixed not erroring when deserializing incomplete JSON with a parameterized constructor
• Fix - Fixed incorrectly parsing scan filter when name is quoted
• Fix - Fixed return type for SByte and SByteNullable in JToken.ToObject
• Fix - Fixed deserializing generic only IList types with a constructor override
• Fix - Fixed null reference error with ReadAsBytes and an empty JSON object
• Fix - Fixed StringEnumConverter when EnumMember defines members that differ only by case
• Fix - Fixed serializing protected override properties
• Fix - Fixed merging null with complex type and MergeNullValueHandling.Ignore
• Fix - Fixed roundtripping double.MaxValue and float.MaxValue as dictionary keys
• Fix - Fixed JsonValidatingReader not closing underlying reader
• Fix - Fixed writing duplicate nulls to trace with TraceJsonWriter.WriteValue for object, Uri, byte[]
• Fix - Fixed BsonWriter.WriteValue erroring for null Uri or byte[]
• Fix - Fixed not calling nullable WriteValue overloads in TraceJsonWriter
• Fix - Fixed serializer not throwing an error when there is a comment followed by additional content when CheckAdditionalContent is true
• Fix - Fixed JObject/JArray Parse not throwing an error when there is a comment followed by additional content
• Fix - Fixed deserializing non-string values in some XML nodes
• Fix - Fixed converting XML to JSON when json:Array and xmlns:json attributes are used directly on the array's element
• Fix - Fixed error when attempting to populate values into read-only collection after creating object from non-default constructor

9.0.1

• New feature - Added support for .NET Core with netstandard1.0
• New feature - Added NamingStrategy, CamelCaseNamingStrategy, SnakeCaseNamingStrategy
• New feature - Added naming strategy properties to JsonObjectAttribute and JsonPropertyAttribute
• New feature - Updated build to use .NET CLI tools
• New feature - Improved performance of many operations on large JArrays
• Fix - Fixed converting XElements without a namespace attribute to JSON
• Fix - Fixed various bugs in JSONPath equals and not equals comparisions
• Fix - Fixed JsonTextReader.ReadAsString incorrectly erroring when reading some numbers
• Fix - Fixed JTokenWriter sometimes losing types when writing JTokens
• Fix - Fixed JTokenWriter sometimes losing types with JValue.WriteTo
• Fix - Fixed incorrect check when looking for non-default constructors on collections
• Fix - Fixed JsonReader.ReadAsDouble with a JValue BigInteger
• Fix - Fixed converting dollar JSON properties to XML
• Fix - Fixed dynamic property getter type information
• Fix - Fixed JsonTextReader reading NaN, Infinity, -Infinity with ReadAsDouble and ReadAsString

8.0.3

• New feature - Added MergeNullValueHandling
• New feature - Added constructor to StringEnumConverter for setting camelcase from attribute
• Fix - Fixed JsonTextWriter not getting buffer from buffer pool
• Fix - Fixed iterating over extension data multiple times
• Fix - Fixed JSONPath queries combining wildcard with property search
• Fix - Fixed serializing ISet with the .NET 4 portable assembly
• Fix - Fixed converting some property names to camel case
• Fix - Fixed F# serialization in partial trust issue

8.0.2

• New feature - Added ReadAsBoolean to JsonReader
• Fix - Fixed serializing certain objects with events
• Fix - Fixed reading booleans as strings
• Fix - Fixed reading large integers as booleans
• Fix - Fixed ReadAsBytes with type name handling

8.0.1

• New feature - Added IArrayPool and a setting on JsonTextReader and JsonTextWriter
• New feature - Added JsonReader.ReadAsDouble
• New feature - Added JsonLoadSettings and CommentHandling to control loading comments in LINQ to JSON
• New feature - Added JsonLoadSettings.LineInfoHandling
• New feature - Added support for JsonConstructorAttribute on list and dictionary collections
• New feature - Added support for deserializing string to Version
• New feature - Added ShouldDeserialize to JsonProperty
• New feature - Added Required.DisallowNull
• New feature - Added support for converting JSON to XML with invalid XML name chracters
• New feature - Improved case-insensitive deserialization performance
• New feature - Improved date parsing performance
• Change - Changed ReadAsDateTime, ReadAsDateTimeOffset, ReadAsBytes, ReadAsString, ReadAsInt32 on JsonReader from abstract to virtual
• Change - Changed parsing JArrays to not include comments by default
• Change - Changed JTokenWriter to use the last property instead of erroring when there are duplicate property names
• Change - Changed Uri JValues to use OriginalString when written to JSON
• Change - Changed DateTimeOffset JValues to return TypeCode.Object from IConvertible.GetTypeCode()
• Fix - Fixed converting JSON metadata array value to XML
• Fix - Fixed not including line information with some XML conversion errors
• Fix - Fixed error when writing certain JSON with escaped characters
• Fix - Fixed PopulateObject error when JSON starts with a comment
• Fix - Fixed incorrect IJsonLineInfo line position after the first line
• Fix - Fixed JSONPath when querying against Uri, Guid and Date values
• Fix - Fixed JsonReader.Path when the path is escaped
• Fix - Fixed writing JRaw twice when a TraceWriter is set
• Fix - Fixed getting the wrong value when reading certain large integers
• Fix - Fixed deserializing DataSet with a null DataTable
• Fix - Fixed deserializing a null DataSet
• Fix - Fixed error when serializing F# discriminated unions in Windows Store apps
• Fix - Fixed error serializing some types when there are conflicting interface properties
• Fix - Fixed error when settings ReferenceResolver is set to null
• Fix - Fixed DateTimeZoneHandling not being used when writing DateTime dictionary keys
• Fix - Fixed bug when converting an integer JValue to a nullable enum
• Fix - Fixed converting null string JValue to XML
• Fix - Fixed Mono generic class private field serialization bug
• Fix - Fixed error when deserializing ignored property with mismatched type
• Fix - Fixed deserializing to a type when setting JToken extension data
• Fix - Fixed setting default values onto properties already set in constructor
• Fix - Fixed casting dynamic JValue to JToken
• Fix - Fixed serializing non-zero based arrays
• Fix - Fixed reading 24 hour midnight ISO dates

7.0.1

• New feature - DiscriminatedUnionConverter performance improvements
• New feature - Added JsonRequiredAttribute
• New feature - Added JsonSerializerSettings.ReferenceResolverProvider property
• New feature - Added DefaultContractResolver.ResolveDictionaryKey
• New feature - Added JsonDictionaryContract.DictionaryKeyResolver
• New feature - Added support for reading GUID strings as bytes in JsonTextReader
• New feature - Added EqualityComparer to JsonSerializer
• Change - Changed reading GUIDs as bytes to only support 00000000-0000-0000-0000-000000000000 format
• Change - Renamed aspnetcore50 target to dnxcore50
• Change - Marked JsonSchema as obsolete
• Change - Marked DefaultContractResolver(bool) as obsolete
• Change - Marked JsonSerializerSettings.ReferenceResolver as obsolete
• Change - Marked JsonDictionaryContract.PropertyNameResolver as obsolete
• Fix - Fixed deserializing empty strings in Hashtables
• Fix - Fixed incorrect JTokenReader.Path in certain situations
• Fix - Fixed error when serializing certain objects in medium trust
• Fix - Fixed deserializing large nullable UInt64 values
• Fix - Fixed writing large UInt64 JValues
• Fix - Fixed converting unmatched namespace prefixes in JSON to XML
• Fix - Fixed IsoDateTimeConverter on DateTime properties with DateTimeFormatHandling.DateTimeOffset
• Fix - Fixed preserving object references with read only properties
• Fix - Fixed error when deserializing large JSON integers to XML
• Fix - Fixed serializing extension data properties with no setter
• Fix - Fixed serializing discriminated unions with type name or reference tracking enabled
• Fix - Fixed DataTableConverter not using JsonSerializer settings
• Fix - Fixed resolving properties from nested interfaces
• Fix - Fixed deserializing classes derived from ConcurrentDictionary
• Fix - Fixed passing default values to constructors
• Fix - Fixed serializing root references from JsonConverters
• Fix - Fixed empty strings coerced to null not erroring with Required.Always
• Fix - Fixed invalid Required.Always error with constructor property name casing
• Fix - Fixed empty string coerce check with Required.Always and constructor

6.0.8

• New feature - Added AttributeProvider to JsonProperty
• Fix - Fixed serializing and deserializing const fields
• Fix - Fixed using MetadataTypeAttribute with proxy classes
• Fix - Fixed bad error message when deserializing unsupported collections

6.0.7

• New feature - Added Annotations to LINQ to JSON
• New feature - Added DescendantsAndSelf method to JObject and JArray
• New feature - Added AncestorsAndSelf method to JToken
• New feature - Added support for tracking references in ISerializable objects
• New feature - Added CurrentToken to JTokenReader
• New feature - Added CurrentToken to JTokenWriter
• New feature - Added WriteToken(JsonToken, object) to JsonWriter
• Fix - Fixed deserializing null values onto JObject and JArray properties
• Fix - Fixed error when extension data bag doesn't inherit from Dictionary<TKey, TValue>
• Fix - Fixed deserializing complex values inside multi-dimensional arrays
• Fix - Fixed serialization settings not being used when deserializing F# unions
• Fix - Fixed MetadataTypeAttribute not being found on some platforms
• Fix - Fixed line breaks in exception messages to use Environment.NewLine
• Fix - Fixed deserializing certain XElements with comments
• Fix - Fixed casting JValues with a negative value to a nullable SByte

6.0.6

• New feature - Added support for ASP.NET CoreCLR
• New feature - Reduced memory allocations when reading and writing JSON
• New feature - Added support for passing arguments to JsonConverters with JsonConvertAttribute
• New feature - Added JsonConvert.ToString overload that takes a StringEscapeHandling parameter
• Change - Omit fields array for F# discriminated union serialization when there are no fields
• Change - Escape property names in path on readers/writers/tokens when a name contains special characters
• Change - Provide line numbers for end tokens on JTokenReader
• Fix - Fixed parsing in SelectToken when the path has an escaped property followed by an unescaped property
• Fix - Fixed error when deserializing a GUID from certain BSON
• Fix - Fixed null reference error when using a JEnumerable created with its default constructor
• Fix - Fixed line breaks in exception messages to use Environment.NewLine
• Fix - Fixed MetadataTypeAttribute reflection error on ASP.NET CoreCLR
• Fix - Fixed immutable collections reflection error on ASP.NET CoreCLR

6.0.5

• New feature - Added support for converting string JValues to enums with JToken.ToObject
• New feature - Added support for creating objects with constructors that have out and ref parameters
• New feature - Improved .NET 4.0 portable assembly performance by using compiled expression reflection
• Fix - Fixed error on Mono versions that don't properly support BigInteger
• Fix - Fixed error in JTokenWriter when disposing after adding a duplicate property
• Fix - Fixed not handling invalid JSON when deserializing with DataTableConverter
• Fix - Fixed error when serializing ObservableCollection in Windows 8 Store apps
• Fix - Fixed not matching some parameters when deserializing via a cosntructor
• Fix - Fixed potential reflection errors by creating making parameterized creators only when needed
• Fix - Fixed deserializing F# unions with out of order properties
• Fix - Fixed camelcase culture bug