using System;

using Newtonsoft.Json;

using System.ComponentModel.DataAnnotations;

using System.Runtime.Serialization;

public class Program

{

    public static void Main()

    {

        var json1 = "{'$type': 'this is the type', 'planNumber': 'this is the plan number', '$myProp': 'this is my prop'}";

        var obj1 = JsonConvert.DeserializeObject<myobject>(json1, new Newtonsoft.Json.JsonSerializerSettings());

        Console.WriteLine("Sample 1");

        Console.WriteLine($"Type: {obj1.Type}");

        Console.WriteLine($"Plan Number: {obj1.PlanNumber}");

        Console.WriteLine($"My Prop: {obj1.MyProp}");

        Console.WriteLine("");

        var json2 = "{'planNumber': 'this is the plan number', '$type': 'this is the type', '$myProp': 'this is my prop'}";

        var obj2 = JsonConvert.DeserializeObject<myobject>(json2, new Newtonsoft.Json.JsonSerializerSettings());

        Console.WriteLine("Sample 2");

        Console.WriteLine($"Type: {obj2.Type}");

        Console.WriteLine($"Plan Number: {obj2.PlanNumber}");

        Console.WriteLine($"My Prop: {obj2.MyProp}");

        Console.WriteLine("");

        Console.WriteLine("Finished!");

    }

    [DataContract]

    public class myobject

    {

        [Required]

        [DataMember(Name="$type")]

        public string Type {get;set;}

        [Required]

        [DataMember(Name="planNumber")]

        public string PlanNumber {get;set;}

        [DataMember(Name="$myProp")]

        public string MyProp {get;set;}

    }

}

​

​