Wed May 20, 2015 10:30 pm
Since OWIN requires IIS support, and there is no IIS currently available on Windows 10 IoT Core it is not supported.
You might be able to achieve a similar result however by using Node.js as a web server instead.
I hope that helps.
Jonathan Tanner | Microsoft | Windows 10 IoT Core Insider Preview Support | This posting is provided 'as is' with no warranties and confers no rights.