System.Timers.Timer doesn't stop with Stop()

[C# Programming]

End Google Ads 201810 - BS.net 01 --> Hi
I have a timer which I've created in runtime with System.Timers.Timer myTimer = new System.Timers.Timer(10000);

I make some settings of this timer and start it with this code:
myTimer.Elapsed += new ElapsedEventHandler(myMethod);
myTimer.Start();

After myTimer started I stop myTimer using myTimer.Stop();

Some time later I need to start myTimer again so I start it with myTimer.Start(); But the weird thing is that it didn't actually stop when myTimer.Stop(); was executed. It's like two instances of myTimer are ticking at different times but I just want the last one to work.

How can I solve this problem?

Thanks in advance.