C# Libraries for driving hardware interfaces connected to Windows IOT core on Raspberry Pi
Available in NuGet.. So install from NuGet Package manager console as:
Install-Package Windows.IoT.Core.HWInterfaces.MPR121
Full writeup is here: http://electronicnirvana.com/blog/capacitive-touch-with-windows-iot-core-on-raspberry-pi-2-using-mpr121
A Touch Sensitive Christmas Tree interfaced to a virtual fire place is here: https://www.hackster.io/mohanp/touchy-christmas-tree-with-raspberry-pi-and-windows-iot-core-4eb869