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(); }