using System;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

​

public class Program

{

    public static void Main()

    {   

​

        string json = "\"\\/Date(1574708400000)\\/\"";

        DateTime date = JsonConvert.DeserializeObject<DateTime>(json);

        Console.WriteLine("UTC    {0}", date.ToString());

        TimeZoneInfo cstZone = TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time");

        DateTime cstTime = TimeZoneInfo.ConvertTimeFromUtc(date, cstZone);

        Console.WriteLine("CST    {0}", cstTime.ToString());

    }

}