using System;

using Newtonsoft.Json;

​

public class Doc

{

    public int A {get;set;}

    public bool B {

        get {   

            return this.A == 1;

        }

    }

}

public class Program

{

    public static void Main()

    {

        Console.WriteLine(JsonConvert.DeserializeObject<Doc>("{\"A\":1, \"B\": false}").B);

    }

}