When either component of the NavigationPaneFlyoutSize property is set to a specific, non-default value, the same component of the NavigationPaneFlyoutSizeResolved returns that same value. When either component of the NavigationPaneFlyoutSize property is left at its default value, the control uses a "best fit" value for the actual width or height; in that case, the NavigationPaneFlyoutSizeResolved property returns that value. The height and width of the NavigationPaneFlyoutSizeResolved cannot exceed the NavigationPaneFlyoutMaximumSize or be less than the NavigationPaneFlyoutMinimumtSize.
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