Chart in Vb.net

Question

Hi I m creating a chart in vb.net  & a Taskbar which will shows duration in minutes, hours.

when i scroll taskbar i want a chart to change with respect to taskbarvalue . this works fine with first scroll event of taskbar.... but when i scroll tak bar again i get folloein error at below line

Line

  Dim Series1 As Series = Chart2.Series("Series1")

Error 

A chart element with the name 'Series1' could not be found in the 'SeriesCollection'.

So how to get rid of this error..

plzz help

Answer 1

I got the Answer

If Chart2.Series.Count = 0 Then
            Chart2.Series.Add("Series1")
        End If