[Browsable(false)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
public object Key {get;}

'Declaration
 
<BrowsableAttribute(False)>
<DesignerSerializationVisibilityAttribute(DesignerSerializationVisibility.Hidden)>
Public ReadOnly Property Key As Object

'Usage
 
Dim instance As Group
Dim value As Object
 
value = instance.Key

Property Value

For example, if the GroupBy property of a group is set to "ShipCountry", the value of the Value property will contain one of the values of the "ShipCountry" field for example, "Canada" or "Japan".

Target Platforms: 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

Reference

Group Class
Group Members