Associate arbitrary objects with JObjects, JArrays, and JValues using annotations to track changes and store application-specific metadata within your JSON structures.

Run Json.NET on the new ASP.NET CoreCLR and benefit from 35% reduced memory allocations during deserialization for better garbage collection performance.

Merge JSON objects and arrays with the new Merge method, and integrate dependency injection frameworks like Autofac and Ninject into Json.NET deserialization.

Serialize and deserialize F# lists, sequences, sets, and maps automatically, plus use MetadataPropertyHandling.ReadAhead to handle metadata properties anywhere in JSON objects.

Query JSON with full JSONPath support using SelectToken and SelectTokens, and serialize F# discriminated unions automatically with Json.NET 6.0.