How to check Service is running or not after service is stopped or started in vb ,asp.net ?

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VB

ASP.NET

Hai
How to check service is running or not after service is stopped or started ?

in my website i have 2 buttons for stop and other for start service,if stop or start service i will redirect the same page,in page load i will check service is running or not,if runninge i will show "Started" word in label and one started image,if it stopped i will show "Paused" word in label and one paused image.

But actually sometimes show both image and my codes is

 Private Sub sampleService()
        imgbtnPlay.Visible = False
        imgbtnPause.Visible = False

        Dim myController As ServiceController
        myController = New ServiceController("sample Service")
        Thread.Sleep(3000)
        If myController.Status = ServiceControllerStatus.Stopped Then
            imgbtnPlay.Visible = True
            imgbtnPause.Visible = False
            lblStatus.ForeColor = Color.Red
            lblStatus.Text = "Paused"
        ElseIf myController.Status = ServiceControllerStatus.Running Then
            imgbtnPause.Visible = True
            imgbtnPlay.Visible = False
            lblStatus.ForeColor = Color.Green
            lblStatus.Text = "Started"
        End If
End Sub

why both image(imgbtnPause and imgbtnPlay) appears same time ?this function in page load event and when start or stop button clicked page is redirect to same page.
Follows codes are 2 image button click event

 Protected Sub imgbtnPause_Click(ByVal sender As Object, ByVal e As ImageClickEventArgs) Handles imgbtnPause.Click



        Dim myController As ServiceController
        myController = New ServiceController("sample Service")

        If myController.Status = ServiceControllerStatus.Running Then

            While myController.Status = ServiceControllerStatus.Running
                myController.Stop()
                imgbtnPause.Visible = False
                imgbtnPlay.Visible = True
                lblStatus.ForeColor = Color.Red
                lblStatus.Text = "Paused"
                ' Thread.Sleep(3000)
                myController.Refresh()
            End While
        End If
          Response.Redirect("Dashboard.aspx")
    End Sub

And this is for Play button click event

    Protected Sub imgbtnPlay_Click(ByVal sender As Object, ByVal e As ImageClickEventArgs) Handles imgbtnPlay.Click




        Dim myController As ServiceController
        myController = New ServiceController("sample Service")

        If myController.Status = ServiceControllerStatus.Stopped Then
            While myController.Status = ServiceControllerStatus.Stopped
                myController.Start()
                imgbtnPause.Visible = True
                imgbtnPlay.Visible = False
                lblStatus.ForeColor = Color.Green
                lblStatus.Text = "Started"
                '  Thread.Sleep(3000)
                myController.Refresh()
            End While
        End If
  Response.Redirect("Dashboard.aspx")
    End Sub

May be behave like this,if i start service,it redirect same page and service is checking,if code pass through IF part ,service is not start so it show pause image ,then it pass else-if part that time service is running so it executes else-if part also,in that service is running,it show play image.i think if and else-if satisfy that condition so it executes both part so only it show both image.Bcz if service is start or stop immediately not affect in service ,it take time.
Regards
Aravind