private void Button_Click(object sender, RoutedEventArgs e)
        {
            a1 = Name.Text;
            a2 = SurName.Text;
            a3 = Phone.Text;
            a4 = null;
            a5 = true;
            Window2 W2 = new Window2();

            if ((Name.Text != "") && (SurName.Text != "") && (Phone.Text != ""))
            {
                using (SqlConnection connection = new SqlConnection(@"Data Source=desktop-403shtp\igorsql;Initial Catalog=Users;Integrated Security=True;ConnectRetryCount=2;ConnectRetryInterval=3"))
                {
                    connection.Open();
                    SqlCommand command = new SqlCommand("INSERT INTO Info (Login, Name, Surname, Phone,InBase) " +
                                                        "VALUES(@Login, @Name, @Surname, @Phone, @InBase)", connection);
                    command.Parameters.AddWithValue("Login", Loginn);
                    command.Parameters.AddWithValue("Name", a1);
                    command.Parameters.AddWithValue("Surname", a2);
                    command.Parameters.AddWithValue("Phone", a3);
                    command.Parameters.AddWithValue("InBase", a5);

                    MessageBox.Show("Registration is over, Sir");
                    command.ExecuteNonQuery();
                    W2.Show();
                    SqlDataAdapter sda1 = new SqlDataAdapter("Select Name From Info where Login = '******'", connection);
                    DataTable      dt1  = new DataTable();
                    sda1.Fill(dt1);
                    MessageBox.Show(Convert.ToString(dt1));
                    W2.Name.Text = Convert.ToString(dt1.Rows[0][0]);

                    this.Close();
                }
            }
            else if (Name.Text == "")
            {
                A11.Foreground = Brushes.Red;
            }
            else if (SurName.Text == "")
            {
                A12.Foreground = Brushes.Red;
            }
            else if (Phone.Text == "")
            {
                A13.Foreground = Brushes.Red;
            }
        }