Thrown when the set value is less than or equal to 0, as the number of pages displayed vertically must be a positive integer.
Remarks
This property allows user to control how many pages are displayed vertically in the viewer when it is set to MultiPage view mode. It is useful for presenting multiple pages of a document simultaneously, improving the document's readability and navigation. The value must be a positive integer; otherwise, an System.ArgumentOutOfRangeException is thrown.