Timer Constructor

Initializes a new instance of the Timer class, and sets all the properties to their initial values.

Namespace:  System.Timers
Assembly:  System (in System.dll)

Public Sub New

The following table shows initial property values for an instance of Timer.


Initial value






100 milliseconds


A null reference (Nothing in Visual Basic).

The following example instantiates a Timer object that fires its Timer.Elapsed event every two seconds (2000 milliseconds), sets up an event handler for the event, and starts the timer. The event handler displays the value of the ElapsedEventArgs.SignalTime property each time it is raised.

Imports System.Timers

Public Class Timer1
    Private Shared aTimer As Timer

    Public Shared Sub Main()
        ' Create a timer with a two second interval.
        aTimer = New System.Timers.Timer(2000)
        ' Hook up the Elapsed event for the timer.  
        AddHandler aTimer.Elapsed, AddressOf OnTimedEvent
        aTimer.Enabled = True

        Console.WriteLine("Press the Enter key to exit the program... ")
        Console.WriteLine("Terminating the application...")
    End Sub  

    ' The event handler for the Timer.Elapsed event.  
    Private Shared Sub OnTimedEvent(source As Object, e As ElapsedEventArgs)
        Console.WriteLine("The Elapsed event was raised at {0}", e.SignalTime)
    End Sub  
End Class  
' The example displays output like the following:  
'       Press the Enter key to exit the program... 
'       The Elapsed event was raised at 4/5/2014 8:48:58 PM 
'       The Elapsed event was raised at 4/5/2014 8:49:00 PM 
'       The Elapsed event was raised at 4/5/2014 8:49:02 PM 
'       The Elapsed event was raised at 4/5/2014 8:49:04 PM 
'       The Elapsed event was raised at 4/5/2014 8:49:06 PM 
'       Terminating the application...

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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