- New feature - Added netstandard2.0 build
- New feature - Added generic JsonConverter
- New feature - Added UnixDateConverter for converting Unix timestaps
- New feature - Added support for regex operator in JSON Paths
- New feature - Added JsonObjectAttribute.ItemNullValueHandling
- New feature - Added JsonObjectContract.ItemNullValueHandling
- New feature - Improved performance when resolving serialization contracts by using ConcurrentDictionary
- New feature - Improved performance of JToken.Path with a faster reverse
- New feature - Improved performance of parsing Int32 JSON integer values
- New feature - Improved performance of parsing and writing enum names
- New feature - Added IgnoreIsSpecifiedMembers to DefaultContractResolver
- New feature - Added IgnoreShouldSerializeMembers to DefaultContractResolver
- New feature - Added support for reading multiple comma delimited values with JsonReader.SupportMultipleContent
- New feature - Improved error message when an object is reused with PreserveReferencesHandling
- New feature - Added IConvertible support to netstandard1.3
- New feature - Added INotifyPropertyChanging support to netstandard1.3
- New feature - Optimized internal buffering when writing very large strings
- New feature - JObject.ContainsKey is now public
- New feature - Improved the error message when serialized ByRef properties
- New feature - Improved the error message when serializing FileInfo/DictionaryInfo without ISerializable
- New feature - Improved the error message when failing conversion in JsonReader.ReadAsInt32 and JsonReader.ReadAsDecimal
- New feature - Improved the error message when deserializing badly formatted regex strings
- Change - Types that implement ISerializable but don't have [SerializableAttribute] are not serialized using ISerializable
- Change - Changed JsonProperty.MemberConverter to obsolete
- Change - Changed camel casing logic for all caps words to not leave last character capitalized
- Change - Changed enum serialization in dictionary keys to use EnumMemberAttribute
- Fix - Fixed converting default datetime in JSON to XML on netstandard1.3
- Fix - Fixed deserializing ObservableCollection in .NET Core 2.0
- Fix - Fixed incorrectly allowing static IsSpecified properties
- Fix - Fixed not preserving trailing zeros when deserializing decimals
- Fix - Fixed JValue.CompareTo with number and string values
- Fix - Fixed not erroring when reading undefined for nullable long
- Fix - Fixed serializing immutable collections when .NET 4.0 or previous Newtonsoft.Json assembly is GACed
- Fix - Fixed writing null values by XmlNodeConverter and RegexConverter
- Fix - Fixed deserializing with a TraceWriter when the reader is not at the start
- Fix - Fixed TraceJsonWriter.WriteValue(object) writing value twice
- Fix - Fixed deserializing with constructor and readonly collection property
- Fix - Fixed error when writing unknown null value as JSON
- Fix - Fixed merging null string values
- Fix - Fixed missing CancellationToken usages in JsonTextWriter.WriteAsync
- Fix - Fixed error with JsonSerializer.Populate and comments in JSON array
- Fix - Fixed error handling when deserializing certain dictionary and lists
- Fix - Fixed serializing collection that is nullable
- Fix - Fixed JsonTextReader sync read in async method
- Fix - Fixed JsonConverter not called when target type is list and token is a string
- Fix - Fixed serializing a property that is defined in multiple interfaces
- Fix - Fixed error when deserializing null value into ConcurrentDictionary
- Fix - Fixed escaping special characters in generated JSON Paths
- Fix - Fixed reading escaped special characters in JSON Paths
- Fix - Fixed using extension data with dictionary that explicitly implements Add method
- Fix - Fixed parsing enum name to exact casing value before falling back to case-insensitive value
- Fix - Fixed DataContractAttribute not forcing object serialization of classes
- Fix - Fixed bug when deserializing into existing non-IList collection
- Fix - Fixed bug when deserializing into existing non-IDictionary collection
- Fix - Fixed JsonReader.ReadAsInt32 with BigInteger values