Paging with Rownumber

DECLARE @PageNum AS INT;
DECLARE @PageSize AS INT;
SET @PageNum = 2;
SET @PageSize = 10;

WITH OrdersRN AS
(
   SELECT ROW_NUMBER() OVER(ORDER BY OrderDate, OrderID) AS RowNum
         ,OrderID
         ,OrderDate
         ,CustomerID
         ,EmployeeID
     FROM dbo.Orders
)

SELECT *
 FROM OrdersRN
WHERE RowNum BETWEEN (@PageNum - 1) * @PageSize + 1
                 AND @PageNum * @PageSize
ORDER BY OrderDate
        ,OrderID;