using System;

using System.Text.Json;

using System.Net.Http;

using System.Text;

​

public class Program

{

    public static void Main()

    {

        var mything = new Thing{Name = "fred", Version = "0.1"};

        var serialized = JsonSerializer.Serialize(mything);

        Console.WriteLine(serialized);

        var sc = new StringContent(serialized, Encoding.UTF8, $"application/json");

        var scStr = sc.ReadAsStringAsync().Result;

        Console.WriteLine(scStr);

    }

}

​

public class Thing

{

    public String Name { get; set; }

​

    public String Version { get; set; }

}