如何绑定两个不同Xamdatagrids的GroupBy？

// 获取grid1和grid2的CollectionViewSource对象
CollectionViewSource collectionViewSource1 = (CollectionViewSource)this.Resources["collectionViewSource1"];
CollectionViewSource collectionViewSource2 = (CollectionViewSource)this.Resources["collectionViewSource2"];

// 获取grid1和grid2的GroupBySettings对象
GroupBySettings groupBySettings1 = grid1.GroupBySettings;
GroupBySettings groupBySettings2 = grid2.GroupBySettings;

// 将grid1的GroupBySettings对象绑定到grid2的GroupBySettings对象
groupBySettings2.GroupDescriptions.Clear();
foreach (GroupDescription groupDescription in groupBySettings1.GroupDescriptions)
{
    groupBySettings2.GroupDescriptions.Add(groupDescription);
}