TL:DR; 100% managed version of ZLIB compression library.
100% managed version of ZLIB compression library. Full C# source code is included.
.Net SDK allows integrating video, audio and DVD playback into software. Use it to enhance videos with bitmap or text overlay, other effects and transitions. Plays files and streams. Supports AVI, MPEG, WMV, 3GP, MOV and other popular formats.
Transfer files using FTP over SSH with the .NET SFTP Library by Kellerman Software. Upload and Download entire directories trees. Supports public and private key encryption with passphrases. Handles dropped connections on bad networks.
Powerful, easy- to-use and full-featured SMTP email component enables your C#, VB.NET, JScript.NET, ASP.NET or other .NET framework applications to send rich TEXT/HTML email based on SMTP/ESMTP protocol. Featured examples are included.