<PackageReference Include="Newtonsoft.Json" Version="14.0.1-beta2" />

Newtonsoft.Json.Linq.JTokenWriter

public class JTokenWriter : JsonWriter
Represents a writer that provides a fast, non-cached, forward-only way of generating JSON data.
namespace Newtonsoft.Json.Linq { public class JTokenWriter : JsonWriter { public JToken CurrentToken { get; } public JToken Token { get; } public JTokenWriter(JContainer container); public JTokenWriter(); } }