Disable label on vertical slice modifier?

Hello, SciChart Team!
I have the same issue, but I create vertical lines programmatically.
Have no idea how to make values labels disappear, here’s the code I use:

var slice = new VerticalLineAnnotation()
            {
                X1 = x,
                Name = harmonic.Name,
                YAxisId = "MainAxis",
                ShowLabel = false,
                IsEditable = false,
                Stroke = new SolidColorBrush(ColorsList[1])
            };
            sliceModifier.VerticalLines.Add(slice);

and the xaml:

<SciChart:VerticalSliceModifier x:Name="sliceModifier" SciChart:SeriesValueModifier.IsSeriesValueModifierEnabled="False" ShowAxisLabels="False" />

Could you please hint me on how to remove values labels programmatically? Or maybe i shouldn’t use VerticalLineAnnotation?
Thanks in advance!
P.S. I Added a picture of what I want to get rid of (please see attachments).

Alexander.

Hello, SciChart

I have found tool which seems to do what i want, but SciChartSurface doesn’t update after i add them programmatically.
By tool i mean VerticalLineAnnotation, here’s the code:

double x = harmonic.Frequency;
        int i = 1;
        while (x < Math.Min((double)MainChartSurface.XAxes[0].DataRange.Max,10000.0))
        {
            VerticalLineAnnotation newAnn = new VerticalLineAnnotation() {
                X1 = x,
                Stroke = new SolidColorBrush(harmonic.Color),
                ShowLabel = false,
                IsEditable = false
            };
            MainChartSurface.Annotations.Add(newAnn);
            x = harmonic.Frequency * ++i;
        }

after this code runs i expect vertical lines to appear, but they don’t. they appear only when pan or zoom chart (just do something): images before and after are attached, please help me to understand what i’m missing to make surface refresh. i tried to use method “SciChartSurface.UpdateLayout();” but it didn’t help.
Thanks in advance
Alexander.