'Declaration Public Property Hidden As Nullable(Of Boolean)
public Nullable<bool> Hidden {get; set;}
When not explicitly set, the actual value of the property is determined at a higher level of the property resolution hierarchy.
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