Is there a JSON library for C# like C++ Rest SDK web::json::value that can unserialize unknow JSON

Checking previous answers (3100), can't find an straight
answer for that

The
problem:

When trying to parse
data form a server API, the data has many different layouts depending of the data
associated with the resource requested.

Some
times the answer is a collection of unstructured data for some entry points and those
are the ones the APP need to parse.

The
Json.NET JSON framework for .NET from
Newtonsoft require a prerequisite
class already defined to match "a previous know structure" for the
serialized JSON to be
deserialized.

Apparently is for
serialize and deserialize any .NET
object and work with those .NET objects, but
not serialize and deserialize JSON in JSON objects,
and work with those objects like with the C++ Rest SDK web::json::value
class.

Some requests have structured information
and was solved defining .NET objects and deserialized them, but when ask for the extra
resource data the answers can be (among many
others):

 [

            null

            ]

or

            [
 {
 "item": "value"
 }

            ]

or

            [
 {
 "item": "value"
 },
 {
 "item2":
            {}
 },
 {
 "item3": {

 "feature":
            "string feature",
 "feature2": {
 "object feature": "large object
            (replaced by string for simplicity)"
 }
 }
 },

            {
 "item4": "large object (replaced by string for simplicity too)"

            }

            ]

Can
anyone know if there is a way (trick, hack) to do this or way to support generic
JSON objects that can be use to serialize, deserialize and query,
set, modify the JSON objects?