title: toolStripBox1.Items.Add(toolStripTextBox.Text); Error at items
body: <p>I know the title might be confusing but I will give a better-detailed explanation.</p>
  
  <p>I am currently trying to make a web browser. I am stuck with this issue and still can't find a fix for it.
  And my error is at toolStripTextBox.Items&lt;--- HERE it turns red squiggly underline
  It gives me...</p>
  
  <blockquote>
    <p>"'ToolStripTextBox' does not contain a definition for 'Items' and no accessible extension method 'Items' accepting a first argument of type 'ToolStripTextBox' could be found (are you missing a using directive or an assembly reference?)"</p>
  </blockquote>
  
  <p>help is appreciated</p>
  
  <pre><code>private void goToolStripMenuItem_Click(object sender, EventArgs e) { 
    ((WebBrowser)tabControl1.SelectedTab.Controls[0]).Navigate(toolStripTextBox1.Text);
    if (!toolStripTextBox1.Items.Contains(toolStripTextBox1.Text))
    {
      toolStripTextBox1.Items.Add(toolStripTextBox1.Text);
    }
  }
  </code></pre>