Timer Class

There are many posts, in many forums, that suggest something along the lines of;

You can count the number of seconds elapsed by setting the interval of the timer to 1000, and in the Tick event add 1 to a variable.  This small sample program requires a forms timer, a button, and 4 textboxes.  It illustrates why the interval is NOT a good time source.



Public Class Form1

    Private Sub Form1_Shown(sender As Object, _
                            e As System.EventArgs) Handles Me.Shown
        Timer1.Interval = 100 'tenth of a second
    End Sub

    Dim tmrIsRun As Boolean = False
    Dim stpw As New Stopwatch
    Dim tenths As Long = 0L

    Private Sub Timer1_Tick(sender As System.Object, _
                            e As System.EventArgs) Handles Timer1.Tick

        If tmrIsRun Then
            'show how much time has elapsed
            TextBox1.Text = String.Format("{0:00}:{1:00}:{2:00}.{3:000}", _
                                          stpw.Elapsed.Hours, _
                                          stpw.Elapsed.Minutes, _
                                          stpw.Elapsed.Seconds, _
                                          stpw.Elapsed.Milliseconds)

            'this illustrates why the timer interval
            'is a bad time source
            tenths += 1
            'show tenths.  Are they the same value?
            TextBox2.Text = (stpw.ElapsedMilliseconds / 100).ToString("n0")
            TextBox3.Text = tenths.ToString("n0")
            'show the variance
            TextBox4.Text = ((stpw.ElapsedMilliseconds / 100) - tenths).ToString("n0")
        End If
    End Sub

    Private Sub Button1_Click(sender As System.Object, _
                              e As System.EventArgs) Handles Button1.Click
        If tmrIsRun Then
            Timer1.Stop()
            stpw.Stop()
        Else
            Timer1.Start()
            stpw.Reset()
            stpw.Start()
            tenths = 0L
        End If
        tmrIsRun = Not tmrIsRun
    End Sub
End Class

For generating timer events similar to js setInterval se DispatcherTimer Class

Plase take care if your want to start your timer yo should enable the timer and set interval in mili seconds

this sample is wron above it is up to windows application if your searching for Mobile

this is the designer code of timer in Mobile

            this.timer1.Enabled = true;
            this.timer1.Interval = 10000;
            this.timer1.Tick += new System.EventHandler(this.timer1_Tick);

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