ListView.ShowGroups Property
.NET Framework 4
Gets or sets a value indicating whether items are displayed in groups.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
Any groups assigned to a ListView control appear whenever the View property is set to a value other than List. The ListView grouping feature lets you create visual groups of logically related ListView items on Windows XP and Windows Server 2003. To enable this feature, your application must call the Application.EnableVisualStyles method. For more information, see the Groups property.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.