[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Gets or sets the name of the property that is used to determine which group(s) an item belongs to.
Assembly: System.Windows (in System.Windows.dll)
To automatically generate groups based on a property value, set the property. To change the property value before groups are generated, use the Converter property to supply a value converter. If is null, the item itself is passed to the value converter.