Connect to I2C

I want to connect some sensor via I2C. As I understand the I2C connectors are connected to the CPU (area U1). I guess this means there is no need to run things over RemoveDevice() in C#. I found https://github.com/Microsoft/Windows-un ... ta.xaml.cs as example. I guess I can access them directly through this lib, but what are the addresse? Can find anything on that.

Thx in advance