Timers difference

pause the thread timer： threadTimer.Change(-1, -1);

three timers difference:

Feature description	System.Timers.Timer	System.Threading.Timer	System.Windows.Forms.Timer
Support for adding and removing listeners after the timer is instantiated.	Yes	No	Yes
Supports call backs on the user-interface thread	Yes	No	Yes
Calls back from threads obtained from the thread pool	Yes	Yes	No
Supports drag-and-drop in the Windows Forms Designer	Yes	No	Yes
Suitable for running in a server multi-threaded environment	Yes	Yes	No
Includes support for passing arbitrary state from the timer initialization to the callback.	No	Yes	No
Implements IDisposable	Yes	Yes	Yes
Supports one-off callbacks as well as periodic repeating callbacks	Yes	Yes	Yes
Accessible across application domain boundaries	Yes	Yes	Yes
Supports IComponent – hostable in an IContainer	Yes	No	Yes