combobox.text + =＆＃34; sometext＆＃34;落下

Question

我想从下拉列表框中进行选择，并将其添加到combobox.text示例中＆＃34;一个;两个;三个＆＃34; 我该怎么做？？？ 由于更新，此代码不起作用（（

FI_ComboBox[ii].SelectionChangeCommitted += (object sender, EventArgs e) =>
                {

                    ComboBox FI_ComboBox1 = (ComboBox)sender;
                    FI_ComboBox1.BeginInvoke(new Action(() =>
                        {

                            FI_ComboBox1.Text += FI_ComboBox1.Items[FI_ComboBox1.SelectedIndex]+";";
                        }
                        ));

                };