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I want to develop a biometric fingerprint authentication system in c#, I have an issue that how can I insert biometric and compare it with it for authentication.

What I have tried:

I have tried a query-based solutions.
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Updated 21-Dec-21 22:19pm

 
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Unless you use built in systems: Fingerprint biometrics - UWP applications | Microsoft Docs[^] you are either into expensive SDK's or a lot of work: a fingerprint isn't just a case of "compare two strings", there is a lot of processing to find the "match": Analysis, Comparison, and Assessment of Latent Fingerprint Image Preprocessing[^]
If you want to develop your own system, you have a lot of reading and hard work ahead! start here: biometric fingerprint authentication system in c - Google Search[^] and work out from there.
 
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