Timer takes more time
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Scenario: 
In a Winform application(C#), I have a Datagridview in which I have to display 4 countdown timers in the format "mm:ss".
Time Interval must be 1000ms.

I was counting the timer down in the elapsed event of system.timers.timer.

On all 4 timers I'm starting to countdown from 2 mins (02:00). 

Issue: 
It takes more time(125 seconds) than 2 mins, to reach 00:00. 
Similarly for 4 mins it takes 7-10 more(247 -250) seconds to reach 00:00



