'Declaration Public Property HeightRule As Nullable(Of RowHeightRule)
public Nullable<RowHeightRule> HeightRule {get; set;}
By default, the row height rule is 'Auto', unless a value is explicitly assigned to the Height property, in which case it defaults to 'Exact'. Explicitly assigning a value to the HeightRule property overrides this behavior.
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