Currently the order in which row attritubes are defined is important

<Row C0="Product" C1="Quantity" Format.Font.Bold="true"/>

does not produce the same result as

<Row Format.Font.Bold="true" C0="Product" C1="Quantity"/>

The second example would produce the correct output here, since in the first case, the style is being defined only after the Product & Quantity cells have been added. Need to add virtual method to PdfXmlBase for defining the order in which attributes are evaluated.