private void buttonAddCSS_Click(object sender, EventArgs e) { AddCSSForm newForm = new AddCSSForm(); DialogResult result = newForm.ShowDialog(this); if (result == DialogResult.OK) { if (newForm.ElementClass == null) { newForm.ElementClass = string.Empty; } if (newForm.ElementName == null) { newForm.ElementName = string.Empty; } AddCSSElement(newForm.ElementName.ToLower(), newForm.ElementClass.ToLower()); } }