OpenPop.NET
Robust open source POP3 client and MIME parser written in C#
...In Visual Studio's Package Manager Console, simply enter the following command:
Install-Package OpenPop.NET
Our homepage (http://hpop.sourceforge.net/) includes examples, documentation and a general introduction for email.
For more information, visit our project homepage.
Code is hosted on GitHub (https://github.com/foens/hpop).