public void IncrementFocusedDataSeriesIndex(int amount)
{
if (DataSeriesCollection.Count < 2) return;
FocusedDataSeriesIndex += amount;
if (FocusedDataSeriesIndex >= DataSeriesCollection.Count)
{
FocusedDataSeriesIndex = 0;
}
else if (FocusedDataSeriesIndex < 0)
{
FocusedDataSeriesIndex = DataSeriesCollection.Count - 1;
}
}