The Tag property can be used to store any object that you want to associate with an item. Although you can store any item, the Tag property is typically used to store string information about the item, such as a unique identifier or the index position of the item's data in a database.
The following code example demonstrates how to initialize a ListViewItem and set the Tag and Text properties. To run this example, place the following code in a form that contains a ListView named ListView1, and call InitializeListViewItems from the form's constructor or Load event-handling method.
Windows 8.1, Windows Server 2012 R2, 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)