I want to deserialize a string (json) to an object (i'd like dynamic).
I use monodevelop and nuget packages
I have been looking for Json.net but also found Newtonsoft.Json.
And I could make a JArray by using Newtonsoft.Json.Linq.
I read on
Json.NET vs Newtonsoft.Json SerializationBinder is different
that these are two versions of the same library?
The main goal is to convert Json to Yaml.
Newtonsoft.Json is most likely the one you want. It has been known as "Json.Net" since it was first released in 2006 and has many features, including the LINQ-to-JSON API (JObject, JArrays, etc.).
However, in December 2018 (after the question you referenced was asked), another author unaffiliated with Newtonsoft released a completely different library on NuGet and called it Json.Net so now there is confusion. This other library advertises itself as a "A Minimalistic JSON handler" so it intentionally does not have very many features. It definitely does not have support for JArrays.