'宣言 Public ReadOnly Property OldSortedColumns As DataGridColumnValue(Of DataGridSortDirection)()
public DataGridColumnValue<DataGridSortDirection>[] OldSortedColumns {get;}
'宣言 Public ReadOnly Property OldSortedColumns As DataGridColumnValue(Of DataGridSortDirection)()
public DataGridColumnValue<DataGridSortDirection>[] OldSortedColumns {get;}