在WPF中对列表框进行排序时，如何将PropertyGroupDescription与相关的表列一起使用

我想用相关的表属性名称lightType对列表进行分组。因此，我尝试了PropertyGroupDescription"RelatedPhantoms[0].lightType.Name"，但它似乎找不到该属性。我该怎么解决这个问题？

            ICollectionView view = CollectionViewSource.GetDefaultView(MainLightList.ItemsSource);
            view.SortDescriptions.Add(new SortDescription("RelatedPhantoms[0].lightType.Name", ListSortDirection.Ascending));
            view.SortDescriptions.Add(new SortDescription("lightSeries.Name", ListSortDirection.Ascending));

            view.GroupDescriptions.Add(new PropertyGroupDescription("RelatedPhantoms[0].lightType.Name"));
            view.GroupDescriptions.Add(new PropertyGroupDescription("lightSeries.Name"));

以下是支持这组光的数据

public class LightHead : CoreEntity
{
    public LightHead()
    {
        this.RelatedPhantoms = new List<LightHead>();
        this.OtherRelatedPhantoms = new List<LightHead>();
    }
    public LightSeries lightSeries { get; set; }
       public Nullable<int> LightSeriesId { get; set; }
    public virtual ICollection<LightHead> RelatedPhantoms { get; set; }
    public virtual ICollection<LightHead> OtherRelatedPhantoms { get; set; }

}
}

public class LightSeries: CoreModelEntity
{
     public string Name { get; set; }
     public ICollection<LightHead> lightHeads { get; set; }
     public LightType lightType { get; set; }
     public Nullable<int> LightTypeId { get; set; }
     public LightSeries() { }
     public LightSeries(string name) 
    {
        this.Name = name;
    }
}