Attach email as an attachment to another email

Question

I would like to know how to attach an email as an attachment to another email in C #. Details:

• I am writing a plugin for Outlook
• I get an error on this line: Attachment attach = new Attachment (mailItem, new System.Net.Mime.ContentType ("text / html; charset = us-ascii"));
• Error message: cannot create an instance of the abstract class or interface "Microsoft.Office.Interop.Outlook.Attachment"

• Code example below

  private void button1_Click(object sender, RibbonControlEventArgs e)
  {
      Explorer explorer = Globals.ThisAddIn.Application.ActiveExplorer();
      Selection selection = explorer.Selection;
  
      if (selection.Count > 0)   // Check that selection is not empty.
      {
          object selectedItem = selection[1];   // Index is one-based.
          MailItem mailItem = selectedItem as MailItem;
  
  
          if (mailItem != null)    // Check that selected item is a message.
          {
              System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage();
              message.To.Add("[e-mail]");
              message.Subject = "blah";
              message.From = new System.Net.Mail.MailAddress("[e-mail]");
              message.Body = "This is the message body";
  
               Attachment attach = new Attachment(mailItem, new System.Net.Mime.ContentType("text/html; charset=us-ascii"));
               message.Attachments.Add(attach);
              System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient("smlsmtp");
              smtp.Send(message);
  
          }
      }
  }
  

Answer 1

After a bit more reading / searching, I was able to find something that works. Probably the hardest part is the first line.

                try
                {
                    Outlook.MailItem tosend = (Outlook.MailItem)Globals.ThisAddIn.Application.CreateItem(Outlook.OlItemType.olMailItem);
                    tosend.Attachments.Add(mailItem);
                    tosend.To = "[e-mail]";
                    tosend.Subject = "test";
                    tosend.Body = "blah";
                    tosend.Save();
                    tosend.Send();
                }
                catch (Exception ex)
                {
                    Console.WriteLine("{0} Exception caught: ", ex);
                }

@Kris Vandermotten ,