private void BtnSave_Click(object sender, EventArgs e) { if (!string.IsNullOrEmpty(txtBoxFirstName.Text) || !string.IsNullOrWhiteSpace(txtBoxFirstName.Text)) { contactModel.FirstName = txtBoxFirstName.Text.Trim(); } if (!string.IsNullOrEmpty(txtBoxLastName.Text) || !string.IsNullOrWhiteSpace(txtBoxLastName.Text)) { contactModel.LastName = txtBoxLastName.Text.Trim(); } if (!string.IsNullOrEmpty(txtBoxEmail.Text) || !string.IsNullOrWhiteSpace(txtBoxEmail.Text)) { contactModel.Email = txtBoxEmail.Text.Trim(); } if (!string.IsNullOrEmpty(txtBoxMobile.Text) || !string.IsNullOrWhiteSpace(txtBoxMobile.Text)) { contactModel.Mobile = txtBoxMobile.Text.Trim(); } if (contactModel != null) { p_addcontactpresenter.AddContact(contactModel); } else { return; } }