Annotation should be update while moving cursor.

Question

Hello,So I have created a PointLineSeries in LightningChart, and I would like to add annotations to the line when I hover the mouse over it. I have written code to show the annotion box and it moves when I move the cursor, but it is blank. How can I add the value to this box? Any help would be appreciated.

private void UpdateCursorResult()
{
_updatedCursorResults = true;
_chart.BeginUpdate();
LineSeriesCursor cursor = _chart.ViewXY.LineSeriesCursors[0];
AnnotationXY annot = _chart.ViewXY.Annotations[0];
float targetYCoordinate = DpiHelper.DipToPx((float)_chartViewXY.GetMarginsRect().Bottom);
double y;
_chart.ViewXY.YAxes[0].CoordToValue(targetYCoordinate, out y, false);
annot.TargetAxisValues.X = cursor.ValueAtXAxis;
annot.TargetAxisValues.Y = y;
double seriesYValue = 0.0;
StringBuilder sb = new StringBuilder();
int seriesNumber = 1;
char c = 'A';
string channelStringFormat = "Product {0}: {2,5}";
string value = "";
AxisY yAxis = null;
foreach (PointLineSeries series in _chart.ViewXY.PointLineSeries)
{
value = "";
seriesYValue = GetTotalSum((int)cursor.ValueAtXAxis, (Product)(seriesNumber - 1));
yAxis = _chart.ViewXY.YAxes[series.AssignYAxisIndex];
value = string.Format(channelStringFormat, c, ConvertToCurrencyString(seriesYValue));
sb.AppendLine(value);
seriesNumber++;
c++;
}
channelStringFormat = "Total sales: {0,8}";
value = string.Format(channelStringFormat, ConvertToCurrencyString(GetTotalSum((int)cursor.ValueAtXAxis)));
sb.AppendLine("");
sb.AppendLine(value);
annot.Visible = true;
_chart.EndUpdate();
}