public MessagingHandler( 
   Message message,
   RecipientCollection recipients 
)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Dynamicweb.Examples.CSharp.EmailMessaging
{
    class MessageRecipientSendingSample
    {
        public void SendMessage()
        {
            //Create a recipient collection and fill it with 100 recipients.
            var recipientCollection = new Dynamicweb.EmailMessaging.RecipientCollection();
            for (var i = 0; i < 100; i++)
            {
                var recipient = new Dynamicweb.EmailMessaging.Recipient();
                recipient.Name = "Test" + i;
                recipient.EmailAddress = String.Format("test{0}@testdomain.tld", i);
                recipientCollection.Add(recipient);
            }

            //Create a message that will be sent.
            var message = new Dynamicweb.EmailMessaging.Message();
            message.Subject = "This is a test email";
            message.HtmlBody = String.Format("<h1>Hello <!--@{0}--></h1><br /><p>This is a test</p>", Dynamicweb.EmailMessaging.Constants.TAG_RECIPIENT_NAME);
            message.SenderEmail = "webshop@mydomain.tld";
            message.SenderName = "Test Webshop";

            //Instanciate the MessagingHandler, which will start the process.
            //Using the CallbackHandler is reviewed in another example.
            var handler = new Dynamicweb.EmailMessaging.MessagingHandler(message, recipientCollection);
            var processStarted = handler.Process();

            //The boolean 'processStarted' indicated whether the process of preprocessing, merging and sending was started.
            //This process is run asynchronously in multiple threads to increase performance.
            if (!processStarted)
                throw new Exception("Sending could not be started");
        }
    }
}