The last item that was right-clicked.
[Visual Basic .NET] Public Property ContextItem As Object
[C#] public object ContextItem {get; set;}
Product Availability
Available with ArcGIS Desktop.
Remarks
This property returns the item that was last right-clicked in the table of contents. Use this property when creating a custom context menu. For example, after right-clicking on a layer in the table of contents, a context menu appears which has several commands including Copy and Remove.