using System;

​

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        var test = new Something

        {

            Test = new Uri ("http://api.com")

        };

        Console.WriteLine(JsonConvert.SerializeObject(test));

        var test2 = JsonConvert.DeserializeObject<Something>("{\"Test\":\"\"}");

        Console.WriteLine(test2.Test);

        Console.WriteLine(test2.Test == null);

        Console.WriteLine(JsonConvert.SerializeObject(test2));

    }   

    private class Something

    {

        public Uri Test {get;set;}

    }

}