(.NET Core C#) Find Certificate for Email Address in Current-User Certificate Store (Windows-Only)

This is a Windows-only example to find a certificate for a given email address in the current-user certificate store (located in the Windows Registry).

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// This is a Windows-only example because it lists the certificates
// stored in the Windows Current User Certificate Store located in the
// Windows Registry.

Chilkat.CertStore certStore = new Chilkat.CertStore();

bool readOnly = true;
bool success = certStore.OpenCurrentUserStore(readOnly);
if (success == false) {
    Debug.WriteLine(certStore.LastErrorText);
    return;
}

string emailAddr = "support@chilkatsoft.com";
Chilkat.Cert cert = certStore.FindCertBySubjectE(emailAddr);
if (certStore.LastMethodSuccess != true) {
    Debug.WriteLine("No certificate found for " + emailAddr);
    return;
}

Debug.WriteLine("Found: " + cert.SubjectDN);

// It should be case-insensitive, however it was found not to be.
// The case-insensitive search is fixed starting in Chilkat v9.5.0.65.
emailAddr = "SUPPORT@chilkatsoft.com";
cert = certStore.FindCertBySubjectE(emailAddr);
if (certStore.LastMethodSuccess != true) {
    Debug.WriteLine("No certificate found for " + emailAddr);
    return;
}

Debug.WriteLine("Found: " + cert.SubjectDN);