title: ComboBox selected text or item
body: <p>I'm working in winform I try a lot of times to catch the text of the comboBox selected item, and I can not, it's always empty, this is code</p>
  
  <pre><code>List&lt;person&gt;op = new List&lt;person&gt;(); op=DAL_O.per();
          foreach(person rt in op )
          {
              comboBox1.DataSource = op;
              comboBox1.DisplayMember = "Name_person";
              comboBox1.ValueMember = "id_person";
          }
      }
  
      private void button2_Click(object sender, EventArgs e)
      {
  
        Lbl_full_list.Text+=comboBox1.Items[comboBox1.SelectedIndex].ToString();
  //or
        Lbl_full_list.Text+= comboBox1.Text;
  
  
      }
  </code></pre>
  
  <p>Maybe someone has an idea? I searched a lot on Google and the results did not work</p>