private void btnXoa_Click(object sender, EventArgs e) { string Key = ""; string Meaning = ""; string Explanation = ""; if (cbWord.Text.ToString() != "") { Key = cbWord.Text; } if (tbMeanning.Text.ToString() != "") { Meaning = tbMeanning.Text; } if (tbExplanation.Text.ToString() != "") { Explanation = tbExplanation.Text; } dicData = new DictionaryData(); dicData.setUp(Key, Meaning, Explanation); dicBLL = new DictionaryBLL(); dicBLL.Xoa(dicData); dictionary = new DictionaryManager(); dictionary.LoadDataToCombobox(cbWord); }