title: Remove duplicates in comboBox
body: <p>I have to remove duplicates in a combobox.</p>
  
  <pre><code>private void cbnama_Click(object sender, EventArgs e)
  {
      List&lt;string&gt;[] list;
      list = mDatabase.Viewpengujian();
  
      cbnama.Items.Clear();
      for (int i = 0; i &lt; list[0].Count; i++)
      {
              cbnama.Items.Add(list[0][i]);
      }
  }
  </code></pre>
  
  <p><strong>Example:</strong></p>
  
  <pre><code>test1
  test2
  test2
  test3
  test3
  </code></pre>