var ds = new BubbleSeries()
{
XValuesSource = new double[] { 1, 2, 3, 4 },
ValuesSource = new double[] { 1, 2, 3, 4 },
SizeValuesSource = new double[] { 1, 2, 3, 4 },
};

ds.PlotElementLoaded += (s, e) =>
{
var pe = (PlotElement)s;
pe.RenderTransform = new ScaleTransform()
{
ScaleX = 1.0 / chart.View.AxisX.Scale,
ScaleY = 1.0 / chart.View.AxisY.Scale
};
pe.RenderTransformOrigin = new Point(0.5, 0.5);
};

chart.Data.Children.Add(ds);
chart.ChartType = ChartType.Bubble;

chart.Actions.Add(new TranslateAction());
chart.Actions.Add(new ScaleAction() { Modifiers = ModifierKeys.Control });