private IEnumerable<MessageContainer> GetMessages(Mailbox mailbox)
        {
            var messageCollection = new List<MessageContainer>();
            //var selectedMailbox = Imap.Client.SelectedMailbox;

            /*var unreadMessagesQuery = Imap.Client.Messages
            .Where(x => !x.Flags.HasFlag(MessageFlags.Seen))
            .Select(x => new MessageContainer
            {
                Uid = x.Uid,
                Envelope = x.Envelope,
                BodyStructure = x.BodyStructure,
                Size = x.Size
            });*/

            using(var session = App.DocumentStore.OpenSession())
            {
                var indexRange = MailController.LastUid - 25;
                var databaseMessages = session.Query<MessageContainer>().Where(x => x.Uid > indexRange).OrderBy(x => x.Uid).ToList();
                messageCollection.AddRange(databaseMessages);
            }

            var messagesQuery = Imap.Client.Messages
            .Where(x => x.Uid > MailController.LastUid)
            //.Where(x => !x.Flags.HasFlag(MessageFlags.Seen))
            .Select(x => new MessageContainer
            {
                Uid = x.Uid,
                Envelope = x.Envelope,
                //BodyStructure = x.BodyStructure,
                Size = x.Size
            }).ToList();

            // Save the emails to the database
            foreach (var messageContainer in messagesQuery)
            {
                if (messageContainer == null) continue;

                if (messageContainer.Uid > MailController.LastUid)
                {
                    MailController.LastUid = messageContainer.Uid;
                }
                else if(messageContainer.Uid == MailController.LastUid)
                {
                    continue;
                }

                using (var session = App.DocumentStore.OpenSession())
                {
                    var loadedMessageContainer = session.Load<MessageContainer>(messageContainer.Uid.ToString());

                    // If there is no message already in the database. Store it.
                    if (loadedMessageContainer == null)
                    {
                        try
                        {
                            /*// Load the Envelope and the Size from the server
                            var container = messageContainer;

                            var message = Imap.Client.Messages
                                .Where(x => x.Uid == container.Uid)
                                .Select(x => new MessageContainer
                                {
                                    Uid = container.Uid,
                                    Mailbox = mailbox,
                                    Envelope = x.Envelope,
                                    Size = x.Size,
                                }).ToList().FirstOrDefault();*/

                            App.Log.Info("Writing mail " + messageContainer.Uid + " to the database.");
                            session.Store(messageContainer, messageContainer.Uid.ToString());
                            messageCollection.Add(messageContainer);
                        }
                        catch (Exception ex)
                        {
                            App.Log.Error(ex);
                            throw;
                        }
                    }
                        // We already have the message in the database. Load it.
                    else
                    {
                        messageCollection.Add(loadedMessageContainer);
                    }

                    session.SaveChanges();
                }
            }

            App.Log.Info("Messages saved to database.");

            //App.Log.Info("There are " + unreadMessagesQuery.AsEnumerable().Count() + " unread messages.");

            /*foreach (var unreadEnvelope in unreadMessagesQuery)
            {
                if (unreadEnvelope == null) continue;

                App.Log.Debug("Unread message: " + unreadEnvelope.Subject);
                messageCollection.Add(unreadEnvelope);
            }*/

            messageCollection.Reverse();
            //lstEnvelopes.ItemsSource = unreadCollection;
            return messageCollection;
        }
        private void AddMessagesOneByOne(Mailbox mailbox)
        {
            var indexRange = MailController.LastUid - 100;
            for (int i = indexRange; i < MailController.LastUid; i++)
            {
                // Open messages from database
                using (var session = App.DocumentStore.OpenSession())
                {
                    var message = session.Load<MessageContainer>(i.ToString());
                    if (message != null && message.Mailbox.Name.Equals(mailbox.Name))
                    {
                        AddEnvelopeSafely(message);
                    }
                }
            }
            //var databaseMessages = session.Query<MessageContainer>().Where(x => x.Uid > indexRange).OrderBy(x => x.Uid).ToList();
            //messageCollection.AddRange(databaseMessages);
            /*foreach (var messageContainer in databaseMessages)
            {
                AddEnvelopeSafely(messageContainer);
            }*/

            var messagesQuery = Imap.Client.Messages
            .Where(x => x.Uid > MailController.LastUid)
                //.Where(x => !x.Flags.HasFlag(MessageFlags.Seen))
            .Select(x => new MessageContainer
            {
                Uid = x.Uid,
                Envelope = x.Envelope,
                Size = x.Size
            }).ToList();

            // Save the emails to the database
            foreach (var messageContainer in messagesQuery)
            {
                if (messageContainer == null) continue;

                if (messageContainer.Uid > MailController.LastUid)
                {
                    MailController.LastUid = messageContainer.Uid;
                }
                /*else if (messageContainer.Uid == MailController.LastUid)
                {
                    continue;
                }*/

                messageContainer.Mailbox = mailbox;
                using (var session = App.DocumentStore.OpenSession())
                {
                    var loadedMessageContainer = session.Load<MessageContainer>(messageContainer.Uid.ToString());

                    // If there is no message already in the database. Store it.
                    if (loadedMessageContainer == null)
                    {
                        try
                        {
                            App.Log.Info("Writing mail " + messageContainer.Uid + " to the database.");
                            session.Store(messageContainer, messageContainer.Uid.ToString());
                            //messageCollection.Add(messageContainer);
                            AddEnvelopeSafely(messageContainer);
                        }
                        catch (Exception ex)
                        {
                            App.Log.Error(ex);
                            throw;
                        }

                        session.SaveChanges();
                    }
                    // We already have the message in the database. Load it.
                    else
                    {
                        //messageCollection.Add(loadedMessageContainer);
                        AddEnvelopeSafely(loadedMessageContainer);
                    }
                }
            }
        }