SmartIrc4net is a multi-threaded and thread-safe IRC library written in C#. It allows you to communicate with IRC servers. The API features full channel syncing and is split in 3 layers: IrcConnection, IrcCommands and IrcClient.
A easy to use, easy to implent, IRC library with DCC (Download) support for C#.
See for more information:
https://github.com/EldinZenderink/SimpleIRCLib
Twitch C# library for accessing Twitch chat and whispers with events, Twitch API with both authenticated and unauthenticated calls, and PubSub with events.
Api component of TwitchLib. This component allows you to access the Twitch API using both authenticated and unauthenticated calls, as well as undocumented and third party APIs.