No, there is not. Joomla is a php script from head to toe. But, why would you want such thing? If you want to install it in a Windows host, it probably will still work as long as the host supports php/mysql.
Joomla is ok but is rather limited when you compare it to Microsoft Sharepoint. I have implemented both and prefer Sharepoint and can write code easily for Sharepoint using asp.net. You might want to look at Sharepoint as a potential solution rather than Joomla. Besides, has anyone ever heard the old saying "You get what you pay for"?