Timer Constructor (TimerCallback, Object, Int32, Int32)

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Initializes a new instance of the Timer class, using a 32-bit signed integer to specify the time interval.

Namespace:  System.Threading
Assembly:  mscorlib (in mscorlib.dll)

public Timer(
	TimerCallback callback,
	Object state,
	int dueTime,
	int period


Type: System.Threading..::..TimerCallback
A TimerCallback delegate representing a method to be executed.
Type: System..::..Object
An object containing information to be used by the callback method, or nullNothingnullptrunita null reference (Nothing in Visual Basic).
Type: System..::..Int32
The amount of time to delay before callback is invoked, in milliseconds. Specify Timeout..::..Infinite to prevent the timer from starting. Specify zero (0) to start the timer immediately.
Type: System..::..Int32
The time interval between invocations of callback, in milliseconds. Specify Timeout..::..Infinite to disable periodic signaling.

The delegate specified by the callback parameter is invoked once after dueTime elapses, and thereafter each time the period time interval elapses.

If dueTime is zero (0), callback is invoked immediately. If dueTime is Timeout..::..Infinite, callback is not invoked; the timer is disabled, but can be re-enabled by calling the Change method.

If period is zero (0) or Infinite and dueTime is not Infinite, callback is invoked once; the periodic behavior of the timer is disabled, but can be re-enabled using the Change method.

The method specified for callback should be reentrant, because it is called on ThreadPool threads. The method can be executed simultaneously on two thread pool threads if the timer interval is less than the time required to execute the method, or if all thread pool threads are in use and the method is queued multiple times.