Number of logical rows that comprises the rectangular selection this cells collection represents. Note that when performing Delete operation (deleting contents of cells), the selection is not required to be rectangular, in which case the indexer may return null values for cellls that are not selected.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
