public void Process()
        {
            {
                try
                {
                    Stream = client.GetStream();
                    // получаем имя пользователя
                    string message = GetMessage();
                    string[] words = message.Split(':');
                    string userName = words[0];
                    string password = words[1];
                    string userName_db = null;
                    string password_db = null;
                    // string Login = message;

                    string db_name = "H:\\2 семестр\\курсач\\DB.db";
                    SQLiteConnection m_dbConnection2;
                    m_dbConnection2 = new SQLiteConnection("Data Source=" + db_name + ";Version=3;");

                    m_dbConnection2.Open();

                    string sql3 = "SELECT * FROM Blacklist WHERE Login =\'" + userName + "\'; ";
                    SQLiteCommand command2 = new SQLiteCommand(sql3, m_dbConnection2);
                    SQLiteDataReader reader2 = command2.ExecuteReader();
                    while (reader2.Read())
                    {

                        string Login = (reader2["Login"] + ":" + reader2["Password"]);
                        string[] words1 = Login.Split(':');
                        userName_db = words1[0];
                        password_db = words1[1];
                    }
                    //if (userName == password) { }
                    m_dbConnection2.Close();
                    if ((password == password_db)&&(userName == userName_db))
                    {
                        server.RemoveConnection(Id);
                        //Close();
                        throw new Exception("Вы в черном списке");
                    }


                    SQLiteConnection m_dbConnection;
                    m_dbConnection = new SQLiteConnection("Data Source=" + db_name + ";Version=3;");

                    m_dbConnection.Open();

                    string sql = "SELECT * FROM Loginpasword WHERE Login =\'" + userName + "\'; ";
                    SQLiteCommand command = new SQLiteCommand(sql, m_dbConnection);
                    SQLiteDataReader reader = command.ExecuteReader();
                    while (reader.Read())
                    {

                       string Login = (reader["Login"] + ":" + reader["Password"]);
                        string[] words1 = Login.Split(':');
                        userName_db = words1[0];
                        password_db = words1[1];
                    }
                    //if (userName == password) { }
                    m_dbConnection.Close();
                    if (userName_db == null)
                    {
                        string db_name1 = "H:\\2 семестр\\курсач\\DB.db";
                        SQLiteConnection m_dbConnection1;
                        m_dbConnection1 = new SQLiteConnection("Data Source=" + db_name1 + ";Version=3;");

                        m_dbConnection1.Open();
                        string sql2 = "INSERT INTO Loginpasword (Login, Password) VALUES ('" + userName + "','" + password + "')";
                        SQLiteCommand command1 = new SQLiteCommand(sql2, m_dbConnection1);
                        command1.ExecuteNonQuery();
                        m_dbConnection.Close();
                    }
                    if (((password == password_db) == false) && ((password_db == null) == false))
                    {
                        //MessageBox.Show("Неверный пароль");
                        server.RemoveConnection(Id);
                        //Close();
                        throw new Exception("Неверный пароль");
                    }
                     else
                            {
                            message = userName + " вошел в чат";
                        if (MainWindow.Instance != null)
                        {
                            MainWindow.Instance.lb1.Dispatcher.BeginInvoke(new Action(delegate ()
                            {
                                MainWindow.Instance.lb1.Items.Add(userName);
                            }));
                        }
                          //  MainWindow.Instance.lb1.Items.Add(userName);
                        server.BroadcastMessage(message, Id);
                        MessageBox.Show(message);
                        for (int i = 0; i < server.count; i++)
                        {
                            server.BroadcastMessage1(server.lastmsg[i], Id);
                            Thread.Sleep(100);
                        }
                          //  server.BroadcastMessage(message, Id);
                            while (true)
                            {
                                try
                                {
                                message = GetMessage();
                                message = String.Format("{0}: {1}", userName, message);
                                server.lastmsg[server.count] = message;
                                server.count++;
                                if (server.count == 10)
                                {
                                    for (int j = 1; j < 9; j++)
                                    {
                                        server.lastmsg[j] = server.lastmsg[j + 1];
                                    }
                                    server.count--;
                                }
                                server.BroadcastMessage(message, Id);
                            }
                            catch
                            {
                                message = String.Format("{0}: покинул чат", userName);
                                server.BroadcastMessage(message, Id);
                                break;
                            }
                                Thread.Sleep(100);
                            }

                    }
                }