Can be used to create or derive a collection with events. Normal collections in .NET do not supply any events indicating when their contents have changed. This class raises various events when its items change.
Allows you to connect to FTP servers, providing the functionality of a simple FTP client, such as listing files, plus downloading and uploading files.
Allows you to send and receive email messages from your applications, using MAPI.
Allows you to use the Windows XP theme APIs to draw themed controls.
The WNet wrapper can be used to enumerate all the computers on a network with a single function call.
Offers some useful miscellaneous utility methods, some of which can be used to get around known bugs in .NET.