private void button1_Click(object sender, EventArgs e)
        {
            if (comboBox1.SelectedItem != null)
            {
                string item = (string)comboBox1.SelectedItem;
                int    qnt  = (int)numericUpDown1.Value;
                for (int i = 0; i < qnt; i++)
                {
                    guid = Guid.NewGuid();
                    r.CreateDiginote(guid.ToString(), new User(item, "", ""));
                }
            }

            this.Close();
        }