LibY!Mail  0.20
A .NET object oriented hierarchical encapsulation of the Yahoo! Mail web services.
LibY!Mail Documentation

How to Use

The main entry point of LibY!Mail is the Account class. Your code should create an instance of it, passing your app ID, shared secret and the token you received from Yahoo! to the constructor.

private Account account = new Account(token, appId, secret);

After initializing the folders (which will call the ListFolders web service method) you can access the Account.Folders to get to the folders collection, and then access the messages in each folder through the Folder.YMailMessages property.