private void btnAdd_Click(object sender, EventArgs e)
        {
            TextForm tf = new TextForm(false);

            tf.Text = "Имя схемы";
            if (tf.ShowDialog() == DialogResult.OK)
            {
                WatchingScheme ws = new WatchingScheme(watching.userId);
                ws.name = tf.TextValue;
                UpdateWatchingScheme(ws);
                using (GmConnection conn = App.CreateConnection())
                {
                    ws.Save(conn);
                }
                lbSchemes.Items.Add(ws);
                lbSchemes.SelectedItem = ws;
            }
        }
        private void btnRename_Click(object sender, EventArgs e)
        {
            WatchingScheme ws = lbSchemes.SelectedItem as WatchingScheme;

            if (ws != null)
            {
                TextForm tf = new TextForm(false);
                tf.Text      = "Имя схемы";
                tf.TextValue = ws.Name;
                if (tf.ShowDialog() == DialogResult.OK)
                {
                    ws.name = tf.TextValue;
                    using (GmConnection conn = App.CreateConnection())
                    {
                        ws.Save(conn);
                    }
                    lbSchemes.Items[lbSchemes.SelectedIndex] = ws;
                }
            }
        }