using System;

public class Program

{

    public static void Main()

    {

        int? epochIntervalConvertedValue = 794672;

​

        if (epochIntervalConvertedValue.HasValue)

        {

            // we need to get the interval from the map

            int intervalInMinutes = int.Parse("30");

            Console.WriteLine(intervalInMinutes);

            // we need to covert the value to actual milliseconds.

            // there are 60000 milliseconds in a minute and the interval is in minutes

            long epochTime = epochIntervalConvertedValue.Value*(intervalInMinutes*60000);

            Console.WriteLine(epochTime);

            var epoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);

            Console.WriteLine(new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc).AddSeconds()(epochTime).ToLongDateString());

        }

    }

}