TessaGridColumnViewModelSortDirection - свойство

public ListSortDirection? SortDirection { get; set; }

Public Property SortDirection As ListSortDirection?
	Get
	Set

public:
property Nullable<ListSortDirection> SortDirection {
	Nullable<ListSortDirection> get ();
	void set (Nullable<ListSortDirection> value);
}

member SortDirection : Nullable<ListSortDirection> with get, set