please help me in GPS system

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C#

Windows

please help me,

i am working in GPS system,and if my system time change then its fluctuating the date and time with current and system datetime.
please help me

my code is here

private void nmeaInterpreter1_DateTimeChanged(object sender, DateTimeEventArgs e)
        {
            BeginInvoke(new MethodInvoker(delegate
            {

                Devices.IsClockSynchronizationEnabled = true;
                dateTimeTextBox.Text = e.DateTime.ToShortDateString() + " " + e.DateTime.ToLongTimeString();
                time = e.DateTime.ToShortDateString() + " " + e.DateTime.ToLongTimeString();
                

            }));
        }