formatting.cs

private void OnLoad(object sender, EventArgs e) {
    chartControl.CustomDrawCrosshair += OnChartCustomDrawCrosshair;
}

private void OnChartCustomDrawCrosshair(object sender, CustomDrawCrosshairEventArgs e) {
    foreach (CrosshairElementGroup group in e.CrosshairElementGroups) {
        foreach (CrosshairElement element in group.CrosshairElements) {
            element.LabelElement.Text = $"{element.Series.Name,-20} {element.SeriesPoint.Values[0],15:C2}";
        }
    }
}