Simple program for create and send invitation to conference.

SendInvitations.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Mail;
using System.Text;
using System.Xml;
using Word = Microsoft.Office.Interop.Word;

namespace SendInvitations
{
    class Participant
    {
        public static Participant Parse(string line)
        {
            var words = line.Split('\t');
            return new Participant
            {
                Id = int.Parse(words[0]),
                Name = words[1].Trim(),
                Email = words[2].Trim(),
                Section = words[3].Trim(),
                ReportName = words[4].Trim(),
            };
        }

        public int Id { get; set; }
        public string Name { get; set; }
        public string Email { get; set; }
        public string Section { get; set; }
        public string ReportName { get; set; }

        public string InvitationText { get; set; }
        public string InvitationDocFilename
        {
            get
            {
                return string.Format("{0}. {1}.doc", Id, Name);
            }
        }
        public string InvitationPdfFilename
        {
            get
            {
                return string.Format("{0}. {1}.pdf", Id, Name);
            }
        }
        public string InvitationTxtFilename
        {
            get
            {
                return string.Format("{0}. {1}.txt", Id, Name);
            }
        }

        public string NameWithPrefix
        {
            get
            {
                return string.Format("Уважаем{1} {0}", Name, Name.Last() == 'а' ? "ая" : "ый");
            }
        }
        public string NameForExpert { get; private set; }

        public void FindNameForExpert()
        {
            var doc = new XmlDocument();
            doc.Load("http://api.morpher.ru/WebService.asmx/GetXml?s=" + Uri.EscapeDataString(Name));
            var nsmgr = new XmlNamespaceManager(doc.NameTable);
            nsmgr.AddNamespace("morpher", "http://morpher.ru/");
            var res = doc.SelectSingleNode("//morpher:Р", nsmgr).InnerText.Split(' ');
            NameForExpert = string.Format("{0} {1}.{2}.", res[0], res[1][0], res[2][0]);
            Console.WriteLine("{0} -> {1}", Name, NameForExpert);
        }
    }

    class Program
    {
        static List<Participant> ReadPartisipants(string filename)
        {
            return File.ReadAllLines(filename, Encoding.GetEncoding(1251)).Select(Participant.Parse).ToList();
        }
        static void CreateInvitations(List<Participant> participants)
        {
            var app = new Word.Application();
            try
            {
                var txt = File.ReadAllText("Invitation.txt", Encoding.GetEncoding(1251));
                foreach (var participant in participants)
                {
                    Console.WriteLine("Creating invitation to {0}", participant.Name);
                    participant.InvitationText = string.Format(txt, participant.NameWithPrefix, participant.Section, participant.ReportName);
                    var doc = app.Documents.Open(Path.Combine(Environment.CurrentDirectory, "Invitation.docx"));
                    foreach (Word.Range range in doc.StoryRanges)
                    {
                        range.Find.Execute2007("{0}", ReplaceWith: participant.NameWithPrefix, Replace: Word.WdReplace.wdReplaceAll);
                        range.Find.Execute2007("{1}", ReplaceWith: participant.Section, Replace: Word.WdReplace.wdReplaceAll);
                        range.Find.Execute2007("{2}", ReplaceWith: participant.ReportName, Replace: Word.WdReplace.wdReplaceAll);
                    }
                    //doc.SaveAs(Path.Combine(Environment.CurrentDirectory, participant.InvitationDocFilename), Word.WdSaveFormat.wdFormatDocument);
                    doc.SaveAs(Path.Combine(Environment.CurrentDirectory, participant.InvitationPdfFilename), Word.WdSaveFormat.wdFormatPDF);
                    doc.Close(SaveChanges: false);
                    File.WriteAllText(participant.InvitationTxtFilename, participant.InvitationText);
                }
            }
            finally
            {
                app.Quit();
            }
        }
        static void CreateExpert(List<Participant> participants)
        {
            var app = new Word.Application();
            try
            {
                foreach (var participant in participants)
                {
                    participant.FindNameForExpert();
                    Console.WriteLine("Creating expert to {0}", participant.NameForExpert);
                    var doc = app.Documents.Open(Path.Combine(Environment.CurrentDirectory, "Expert.doc"));
                    foreach (Word.Range range in doc.StoryRanges)
                    {
                        range.Find.Execute2007("{0}", ReplaceWith: participant.NameForExpert, Replace: Word.WdReplace.wdReplaceAll);
                        range.Find.Execute2007("{1}", ReplaceWith: participant.ReportName, Replace: Word.WdReplace.wdReplaceAll);
                    }
                    //doc.SaveAs(Path.Combine(Environment.CurrentDirectory, participant.InvitationDocFilename), Word.WdSaveFormat.wdFormatDocument);
                    doc.SaveAs(Path.Combine(Environment.CurrentDirectory, participant.InvitationPdfFilename), Word.WdSaveFormat.wdFormatPDF);
                    doc.Close(SaveChanges: false);
                }
            }
            finally
            {
                app.Quit();
            }
        }
        static void SendInvitations(List<Participant> participants)
        {
            using (var client = new SmtpClient())
            {
                var reply = new MailAddress("result@center.nstu.ru", "Оргкомитет конференции");
                foreach (var participant in participants)
                {
                    var to = new MailAddress(participant.Email, participant.Name);
                    using (var attachment = new Attachment(participant.InvitationPdfFilename))
                    {
                        using (var message = new MailMessage())
                        {
                            message.To.Add(to);
                            message.Subject = "Приглашение на конференцию НТИ";
                            message.SubjectEncoding = System.Text.Encoding.UTF8;
                            message.Body = participant.InvitationText;
                            message.BodyEncoding = System.Text.Encoding.UTF8;
                            message.ReplyToList.Add(reply);
                            message.Attachments.Add(attachment);
                            client.Send(message);
                        }
                    }
                    Console.WriteLine("Send invitation to {0} completed.", participant.Name);
                }
            }
        }

        static void Main(string[] args)
        {
            string filename = "list.txt";
            if (args.Length > 0 && !string.IsNullOrWhiteSpace(args[0]))
                filename = args[0];

            if (!File.Exists(filename))
            {
                Console.WriteLine("File {0} not found!", filename);
                return;
            }
            var participants = ReadPartisipants(args[0]);
            //CreateExpert(participants);
            CreateInvitations(participants);
            SendInvitations(participants);
        }
    }
}