(.NET Core C#) Get the Email Received Date/Time

Get's the date/time from the topmost Received header. The date/time of when you received an email may be different than the date/time stored in the Date header field, which if truthful, is the date when the email was sent.

The Received header field will look something like this:

Received: from mail.example.com (mail.example.com [99.255.255.99])
 by inbound-smtp.us-west-2.amazonaws.com with SMTP id 72ma443vs1g0o6vqd8erojkpss35s0dt32h323o1
 for admin@chilkatsoft.com;
 Wed, 25 Jul 2018 08:04:23 +0000 (UTC)

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Chilkat.Email email = new Chilkat.Email();

bool success = email.LoadEml("qa_data/eml/p.eml");
if (success != true) {
    Debug.WriteLine(email.LastErrorText);
    return;
}

Chilkat.StringBuilder sb = new Chilkat.StringBuilder();
sb.Append(email.GetHeaderField("Received"));

//  Replace semicolons with CRLF's
int numReplaced = sb.Replace(";","\r\n");

Chilkat.StringTable st = new Chilkat.StringTable();
st.AppendFromSb(sb);

if (st.Count == 0) {
    Debug.WriteLine("Should have at least one line..");
    return;
}

//  The date/time string is the last line in the string table.
sb.SetString(st.StringAt(st.Count - 1));
sb.Trim();

Debug.WriteLine("Received date/time = " + sb.GetAsString());