using finger print in the application depends on what type of application you are developing. For e.g. if you want web applicaton to be authenticated against finger print in mobile device, you may use Web Authentication API.
https://developer.mozilla.org/en-US/docs/Web/API/Web_Authentication_API
https://itnext.io/biometrics-fingerprint-auth-in-your-web-apps-d5599522d0b3
If you are speaking about native mobile application, refer MAUI
https://www.andreasnesheim.no/how-to-use-biometric-authentication-in-net-maui/
Hope this helps