C#.Net - GetDssDuration

public static TimeSpan GetDssDuration(string fileName)

        {

            const int durationOffset = 62;

            const int durationLength = 6;

            const int headerLength = durationOffset + durationLength;

            using (var fileStream = File.OpenRead(fileName))

            {

                var fileHeader = new byte[headerLength + 1];

                fileStream.Read(fileHeader, 0, headerLength);

                var hoursData = new byte[2];

                var minutesData = new byte[2];

                var secondsData = new byte[2];

                Array.Copy(fileHeader, durationOffset, hoursData, 0, 2);

                Array.Copy(fileHeader, durationOffset + 2, minutesData, 0, 2);

                Array.Copy(fileHeader, durationOffset + 4, secondsData, 0, 2);

                return new TimeSpan(int.Parse(Encoding.ASCII.GetString(hoursData)), int.Parse(Encoding.ASCII.GetString(minutesData)), int.Parse(Encoding.ASCII.GetString(secondsData)));

            }

        }