Open source twain library

Question

Can you advice me open source twain library for scannning with pure good API.

Answer 1

Have a look at Saraff Twain

Project is active and has a few nice examples. I implemented it in a few minutes

UPDATE: The project moved to github

Answer 2

Take a look at TWAIN sample Data Source and Application. Although written in C++, you can use the supplied DLLs in your .NET application.

Also, I'd recommend reading this article on TWAIN image acquisition in C#.