private void btnEncrypt_Click(object sender, EventArgs e) { if (CheckTextBox()) { var entryStr = txtEncrypt.Text; string key = txtKey.Text; try { if (cbBase64.Checked) { byte[] bytes = DES3.Encrypt(entryStr, key); txtDecrypt.Text = FormatString.ToBase64String(bytes); } if (cbHex16.Checked) { byte[] bytes = DES3.Encrypt(entryStr, key); txtDecrypt.Text = FormatString.Hex_2To16(bytes); } } catch (Exception ex) { txtDecrypt.Text = ex.Message; } } }