Visibility Enumeration
.NET Framework 4.5
Specifies the display state of an element.
Namespace: System.Windows
Assembly: PresentationCore (in PresentationCore.dll)
Elements that have a Visibility value of Collapsed do not occupy any layout space. By default, elements are Visible.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.