Hi,
I have several questions:
When connecting i2c device i use Di2 and Di3 for SDA and SCL pins?
Do i need to set those pins in .net code somehow?
Does anyone have successful example of MPR121 touch read?
Can i read touched electrodes not only via IRQ but somehow via i2c connection?
Thanks!
Yes, see “I2C bus” tutorial on this page Support - GHI Electronics
No, see the tutorial I mentioned above
What is MPR121?
You mean on the MPR121? I think this question is best answered by the MPE121 datasheet.
Welcome to the community.
Yep its in code at http://code.tinyclr.com/project/245/sparkfun-mpr121-capacitive-keypad-driver/
I worked this out a while back and it not only shows how to talk to the MPR121 capacitive keypad but it demonstrates Bec A Fuel’s i2c extention that allowed me to have both the keypad and a New Haven display connected and interacting.
Let us know how things go there are a lot of us here willing to give help/guidance 
tnx guys alot.
I’ll give it a try.