How to change the size of the circle of Scattered chart?

You can change the size of the circle by changing the size of the Symbol of chartStyleInfo.

C#

 void series2_PrepareStyle(object sender, ChartPrepareStyleInfoEventArgs args)

    {

        ChartSeries series = sender as ChartSeries;

         if (series != null)

        {

args.Style.Text = string.Format("{0}", series.Points[args.Index].YValues[0]);

args.Style.Symbol.Shape = ChartSymbolShape.Circle;

//Change the size of symbol

args.Style.Symbol.Size = new Size(50, 50);

        }

    }

VB

Private Sub series2_PrepareStyle(ByVal sender As Object, ByVal args As ChartPrepareStyleInfoEventArgs)

 Dim series As ChartSeries = CType(IIf(TypeOf sender Is ChartSeries, sender, Nothing), ChartSeries)

   If Not series Is Nothing Then

   args.Style.Text = String.Format("{0}", series.Points(args.Index).YValues(0))

     args.Style.Symbol.Shape = ChartSymbolShape.Circle

      'Change the size of symbol

   args.Style.Symbol.Size = New Size(50, 50)

  End If

 End Sub