private void distribute_Click(object sender, RoutedEventArgs e)
        {
            string connStr = connectionString.Text +
                             "user id=" + common.username +
                             ";password="******"Распределить", "Применить");

            AW.Show();
        }
        private void ButtonDelete_Click(object sender, RoutedEventArgs e)
        {
            string connStr = connectionString.Text +
                             "user id=" + common.username +
                             ";password="******"Занятые темы")
                {
                    tablesAddForm = new TablesAddForm(connStr, "delete");
                    tablesAddForm.Show();
                }
                else
                {
                    AdaptiveWindow AW = new AdaptiveWindow(connStr, comboBoxTable.Text, "Удалить");
                    AW.Show();
                }
            }
        }