Microsoft Hadoop Integration
Microsoft is working on Hadoop along with HortonWorks. You can see a presentation about it here.I guess you'd be able to use C# via hadoop streaming but it seems the main plan is to use javascript for hadoop jobs. It is currently available in Azure. A CTP for windows server should be available soon
Regarding Qizmt - I don't know much about it but a quick look at its repository shows just 2 committers and a GPLv3 license -I would probably not use that