System.Security.Cryptography.X509Certificates.X509FindType public enum X509FindType Documentation FindByApplicationPolicy = 10 FindByCertificatePolicy = 11 FindByExtension = 12 FindByIssuerDistinguishedName = 4 FindByIssuerName = 3 FindByKeyUsage = 13 FindBySerialNumber = 5 FindBySubjectDistinguishedName = 2 FindBySubjectKeyIdentifier = 14 FindBySubjectName = 1 FindByTemplateName = 9 FindByThumbprint = 0 FindByTimeExpired = 8 FindByTimeNotYetValid = 7 FindByTimeValid = 6