Right-click the file, go to , and verify the Digital Signatures tab says "DigitalPersona, Inc." Match Architecture
The file you're looking for, DPFPVerNET.dll (version 1.6.1.0) , is a core component of the DigitalPersona One Touch for Windows SDK dpfpvernet version 1610 download verified
Which (e.g., Visual Studio 2022, .NET Framework 4.8) are you using to compile the code? Right-click the file, go to , and verify
SDK Digital Persona/Bin/EN/DPFPDevNET.XML at master - GitHub Right-click the file