<PackageReference Include="NETStandard.Library" Version="2.0.1" />

System.Security.Cryptography.X509Certificates.X509SubjectKeyIdentifierHashAlgorithm

namespace System.Security.Cryptography.X509Certificates { public enum X509SubjectKeyIdentifierHashAlgorithm { CapiSha1 = 2, Sha1 = 0, ShortSha1 = 1 } }