How to show different data marker based on the value in the WPF Chart?

 <syncfusion:SfChart >
          <syncfusion:SfChart.Resources>
              <ResourceDictionary>
                  <DataTemplate x:Key="CrossTemplate">
                      ……..
                  </DataTemplate>
 
                  <DataTemplate x:Key="DiamondTemplate">
                      <Grid Height="15" Width="15">
                         <Path  Stretch="Fill" Stroke="{Binding Interior}" Fill="{Binding Interior}"  Data="F1 M 156.37,93.7292L 134.634,
71.8159L 112.906,49.9025L 91.1711,71.8159L 69.4364,93.7292L 70.1524,93.7292L 91.8844,115.644L 113.623,137.556L 135.362,
115.644L 157.09,93.7292L 156.37,93.7292 Z "/>
                      </Grid>
                  </DataTemplate>
                
                    <local:SymbolDataTemplateSelector HighValueTemplate="{StaticResource CrossTemplate}" 
LowValueTemplate="{StaticResource DiamondTemplate}" x:Key="SymbolTemplateSelectorKey"/>
 
                    <DataTemplate x:Key="symbolTemplate">
                          <ContentControl Content="{Binding}" ContentTemplateSelector="{StaticResource  SymbolTemplateSelectorKey}"/>
                    </DataTemplate>
               </ResourceDictionary>
          </syncfusion:SfChart.Resources>
             ………        
           <syncfusion:LineSeries ItemsSource="{Binding Data}" 
                                  XBindingPath="XValue" 
                                  YBindingPath="YValue">
                <syncfusion:LineSeries.AdornmentsInfo>
                    <syncfusion:ChartAdornmentInfo SymbolTemplate="{StaticResource symbolTemplate}">
                    </syncfusion:ChartAdornmentInfo>
                </syncfusion:LineSeries.AdornmentsInfo>
            </syncfusion:LineSeries>               
  </syncfusion:SfChart>
 

public class SymbolDataTemplateSelector : DataTemplateSelector
    {
        public DataTemplate HighValueTemplate { get; set; }
        public DataTemplate LowValueTemplate { get; set; }
 
        public override DataTemplate SelectTemplate(object item, DependencyObject container)
        {
            if (item == null) return null;
 
            var adornment = item as ChartAdornment;            
            var model = adornment.Item as Model;
            // You can change the value based on your requirement
            if (model.YValue > 150)
            {
                return HighValueTemplate;
            }
            else
            {
                return LowValueTemplate;
            }
        }
    }