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Timer.Timer(TimerCallback, Object, Int64, Int64) Constructor

Initializes a new instance of the Timer class, using 64-bit signed integers to measure time intervals.

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

public Timer (
	TimerCallback callback,
	Object state,
	long dueTime,
	long period
)
public Timer (
	TimerCallback callback, 
	Object state, 
	long dueTime, 
	long period
)
public function Timer (
	callback : TimerCallback, 
	state : Object, 
	dueTime : long, 
	period : long
)
Not applicable.

Parameters

callback

A TimerCallback delegate representing a method to be executed.

state

An object containing information to be used by the callback method, or a null reference (Nothing in Visual Basic).

dueTime

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.

period

The time interval between invocations of callback, in milliseconds. Specify Timeout.Infinite to disable periodic signaling.

Exception typeCondition

ArgumentOutOfRangeException

The dueTime or period parameter is negative and is not equal to Infinite.

NotSupportedException

The dueTime or period parameter is greater than 4294967294.

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

NoteNote:

Visual Basic users can omit the TimerCallback constructor, and simply use the AddressOf operator when specifying the callback method. Visual Basic automatically calls the correct delegate constructor.

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.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0

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