How to write your data to the mifare card?

Question

NFC

I have an ACR-122U smart card reader and a mifare classic 1k card set. Through GoToTags, it is possible to successfully overwrite the smart card with your data, respectively, in my opinion, there are standard keys (correct if I'm wrong). I have the task of making a simple application that will write data to the card (a certain number).
Is there any handy library for this purpose? Tried pcsc-sharp, but didn't quite understand how to record anything with it.

Answer 1

Well, here is an android application
https://github.com/gshevtsov/TroikaDumper

Answer 2

Try using the standard SDK for your reader.