EmailHelper

MailAddressCollection.cs

using System;
using System.Net.Mail;
using System.Text;
using System.Text.RegularExpressions;

public class EmailHelper
{
    MailAddressCollection EmailsTo = new MailAddressCollection();

    /// <summary>
    /// Convert string com endereços de email em objetos
    /// </summary>
    public MailAddressCollection ParseEmailAddress(string email)
    {
        email = Regex.Replace(email, @"[,]|[;]|[|]", "#");
        string[] emails = email.Split('#');
        foreach (var e in emails)
        {
            if (e.Length > 5)
            {
                EmailsTo.Add(new MailAddress(e));
            }
        }

        return EmailsTo;
    }
}