At the moment no, although we welcome any community efforts to do so!
Since it’s just me, with a little help from the community, @RogueM and @sandyjmacdonald keeping the software up to scratch- there just aren’t enough hours in the day to keep on top of the Python stuff, without adding C# into the mix!
I’m fairly rusty on the C# front, too, not that I was ever the most effective C# programmer ;) A lot of the new design patterns, for example the Async/Await stuff, are totally alien to me, so I’d have a lot of catching up to do before I could make anything worthy of widespread use.
Another problem is that Windows IoT, at least when I tried it out, didn’t give quite the same flexibility as GPIO assignment and control that Raspbian does. That’s to say that some pins were “off limits” and permanently assigned to a specific function like UART etc. A quick Google and it looks like they’ve rectified that, though: https://developer.microsoft.com/en-us/windows/iot/win10/samples/pinmappingsrpi2
I did actually get a Display-o-Tron backlight up and running a while ago, but to get it working fully I’d have first have to port our Cap1xxx, SN3218 and st7036 libraries!