How to pause/resume the timer in WPF ?

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C#

.NET

WPF

I have implemented a timer using dispatcher timer class

I know how to start and stop the timer, but I don't know how to pause and resume it. Any help would be greatly appreciated. Thanks.

This is how i usually start and stop the timer.

private DispatcherTimer T;

public void timer_Start(double gap)
       {
           T.Interval = TimeSpan.FromSeconds(gap);
           T.Tick += show_time();
           T.Start();
       }

private void button2_Click(object sender, RoutedEventArgs e)
     {
         T.Stop();
     }