How do you rotate x-axis labels in code?

From reading the material on the site I know how to do what I want to do in xaml:

    <Style x:Key="AxisLabelStyle" TargetType="s:DefaultTickLabel">
    <Setter Property="RenderTransform">
        <Setter.Value>
            <RotateTransform Angle="30"/>
        </Setter.Value>
    </Setter>
    <Setter Property="HorizontalAnchorPoint" Value="Left"/>
</Style>

Now however my chart will be using two diffrent x-axis, one numeric and one with date and time. Both axis are defined in code:

            _xAxisNum = new NumericAxis
        {
            ...
        };

        _xAxisDat = new DateTimeAxis
        {
            ...
        };

        InitializeComponent();
        sciChartSurface.XAxis = _xAxisDat;

What code must I add to my x-axes to get the same result as the xaml above accomplishes? Or can I achieve what I want with a LabelProvider?