Platform.Network.Time.NtpPacket.CalculateLocalClockOffset C# (CSharp) Méthode

        public static TimeSpan CalculateLocalClockOffset(NtpPacket resultPacket, DateTime resultTime)
        {
            return TimeSpan.FromTicks(((resultPacket.ReceiveTimeSpamp - resultPacket.OriginateTimeSpamp) + (resultPacket.TransmitTimeSpamp - resultTime)).Ticks / 2);
        }

        public override void DoRun()
        {
            SetTaskState(TaskState.Running);

            try
            {
                progress.SetState(1, "Connecting");

                System.Threading.Thread.Sleep(1000);

                var udpClient = this.CreateUdpClient();

                progress.SetState(2, "Connected");

                var packet = new NtpPacket();

                packet.VersionNumber     = 4;
                packet.Mode              = NtpMode.Client;
                packet.TransmitTimeSpamp = DateTime.Now;

                var remoteEndPoint = new IPEndPoint(IPAddress.Any, 0);

                var outdata = packet.ToRawByteArray();

                byte[] data = null;

                for (int i = 0; i < 5; i++)
                {
                    data = null;

                    progress.SetState(3, $"Requesting Time (Attempt {i + 1})");

                    udpClient.Send(outdata, outdata.Length);

                    try
                    {
                        data = udpClient.Receive(ref remoteEndPoint);

                        break;
                    }
                    catch (SocketException)
                    {
                        continue;
                    }
                }

                var now = DateTime.Now;

                if (data == null)
                {
                    throw new TimeoutException();
                }

                var resultPacket = NtpPacket.ParseRawByteArray(data);

                var localOffset = NtpPacket.CalculateLocalClockOffset(resultPacket, now);

                value = localOffset;

                SetTaskState(TaskState.Finished);

                progress.SetState(4, "Finished");
            }
            finally
            {
                if (this.TaskState != TaskState.Finished)
                {
                    SetTaskState(TaskState.Stopped);

                    progress.SetState(4, "Stopped (Error)");
                }
            }
        }