how to set interval for chart axis without disable style of independent axis wpf toolkit?

I have added rotation to x axis of chart

 lineSeria = new LineSeries();

var xLabel = new Style(typeof(AxisLabel));
                var rotation = new Setter(AxisLabel.RenderTransformProperty, new RotateTransform() { Angle = -90, CenterX = 50, CenterY = 1 });
                
                lineSeria.ItemsSource = drowMap[zoomedPointElem.Key];
                lineSeria.Title = zoomedPointElem.Key;

                lineSeria.DependentValuePath = "Value";
                lineSeria.IndependentValuePath = "Key";

                lineSeria.IndependentAxis = new CategoryAxis { Orientation = AxisOrientation.X };

                xLabel.Setters.Add(rotation);

                var xAxis = (CategoryAxis)lineSeria.IndependentAxis;
                xAxis.AxisLabelStyle = xLabel;

                multiChart[coefficient].Series.Add(lineSeria);

and i want add interval for same axis but when i do this it disable rotation

                linAxis = new LinearAxis();

                linAxis.Orientation = AxisOrientation.X;
                linAxis.Interval = 10;

                multiChart[coefficient].Series.Add(linAxis);

How to put it all together? need code behind, thanks.