private void RandomCodeButton1_Click(object sender, EventArgs e) { if (String.IsNullOrWhiteSpace(tbLength.Text) || String.IsNullOrWhiteSpace(tbInclude.Text)) { WarningNotice.Null(); return; } if (!int.TryParse(tbLength.Text, out _)) { if (long.TryParse(tbLength.Text, out _)) { WarningNotice.IsLongType(); return; } WarningNotice.NotNumber(); return; } tbRandomCodeResult.Text = RandomCode.GetRandomString(int.Parse(tbLength.Text), tbInclude.Text); }