private void ClearFormData()
 {
     FirstNameTextBox.Clear();
     LastNameTextBox.Clear();
     EmailAdrTextBox.Clear();
     ContactNumberTextBox.Clear();
 }
        private void ResetForm()
        {
            FirstNameTextBox.Clear();
            LastNameTextBox.Clear();
            EmailAddressTextBox.Clear();
            ContactNumberTextBox.Clear();

            // clear Contact ComboBox List Items
            ContactComboBox.Items.Clear();
        }
 private void ContactNumberTextBox_Leave(object sender, EventArgs e)
 {
     if (ContactNumberTextBox.TextLength < 8)
     {
         ContactNumberTextBox.Focus();
         ContactNumberTextBox.SelectAll();
     }
     else
     {
         NextButton.Enabled = true;
     }
 }