using System;

public class Program

{

    public static void Main()

    {

        //string test = "{ \"id\": \"6042559059244\", \"account_id\": \"1660986694155997\", \"time_ref\": 1455035543, \"time_completed\": 1455035865, \"async_status\": \"Job Completed\", \"async_percent_completion\": 100 }";

        string test = "{\"report_run_id\":\"6042559059244\"}";      

        dynamic jsonDe = Newtonsoft.Json.JsonConvert.DeserializeObject(test);

        Console.WriteLine(jsonDe.report_run_id);

    }

}