Cocoa# (CocoaSharp) is a bridge framework on OS X to allow applications developed with the Mono runtime to access the Cocoa API. It provides direct access to the Cocoa API using a dot notation familiar to languages working on the Mono runtime such as C#. Cocoa# is currently being included in the Mono distribution for OS X.
It has not seen any development since 2008 and is considered deprecated.
Releases
Some significant releases were the initial release of 0.1 on August 12, 2004, and release 1.0.6 released on February 18, 2005 where the Cocoa# libraries were functional enough to include in the Mono distribution.
References
Cocoa Sharp Wikipedia(Text) CC BY-SA