public void RenewChart()
{
if (ChartCache != null)
{
BottomAxis.ClearAxis();
int n = ChartCache.AbsoluteCount;
if (n > 0)
{
List <double> p = ChartCache.AbsoluteGetAt(n - 1);
if (p != null && p.Count > 0)
{
double v = p[0] / 1000.0;
BottomAxis.AbsoluteMaximum = v;
}
}
RefreshChart(n);
}
}