public DataSourceView(HierarchicalDataSet hDataSet, string viewPath)
 {
     this.hDataSet = hDataSet;
     this.viewPath = viewPath;
 }
 public HierarchicalEnumerable(HierarchicalDataSet hDataSet, string viewPath)
 {
     this.hDataSet = hDataSet;
     this.viewPath = viewPath;
 }
 public HierarchyData(HierarchicalDataSet hDataSet, string viewPath, DataRowView row)
 {
     this.hDataSet = hDataSet;
     this.viewPath = viewPath;
     this.row      = row;
 }