我想在两个列表之间应用除外。 一个列表是MailAddress格式，另一个是String（转换为列表））

Question

I want to apply Except between two lists. One list is in MailAddress format and other is a String (Converted to list))?

         List<MailAddress> toemails = new List<MailAddress>();
            //List<String> emailsFrom = address.Split(';').ToList();
            List<string> temp1 = new List<string>();
            List<MailAddress> temp2 = new List<MailAddress>();
            List<MailAddress> temp3 = new List<MailAddress>();

      //message.to gives me a list of messages (outgoing)
            foreach (var e in message.To)
            {
                temp2.Add(e);
            }

           //result contains a list of emails fetched (count=7)
            var result = from lst in ListofEmails where lst.ToLower().Length < 50 select lst;
            temp1 = result.ToList();

            //(Not able to understand this, how to proceed)

            // toemails = temp2.Except(temp1.);
            // MailMessage msg = new MailMessage();

The output, result of Except , should be a list of MailAddress objects.

Answer 1

No need to use Except, just use basic LINQ:

Since temp1 contains the e-mail addresses...

toemails = temp2.Where(email =>
          !temp1.Any(e => e.Equals(email.Address, StringComparison.OrdinalIgnoreCase))).ToList();