if string item is not in string array
<p>I have a string array.
I need to display buttons based on if the selected item is in the array.
I need to know how to tell the program if "(array.<strong>NOT</strong> Contains("string"))".
Please can anybody help me??
Thanks in advance</p>

<p>My code:</p>

<pre><code>    List&lt;string&gt; activationids = new List&lt;string&gt;();
    foreach (ModuleActivation moduleactivation in activationid)
         activationids.Add(moduleactivation.ActivationID);

    string gvselectActID = GridView1.SelectedRow.Cells[1].Text;

    if (activationids.Contains(gvselectActID))
    {
      activateInsert.Visible = true;
      activateUpdate.Visible = false;
      deactivate.Visible = true;
    }
    else if (activationids."NOT" Contains(gvselectActID))
    {
      activateInsert.Visible = false;
      activateUpdate.Visible = true;
      deactivate.Visible = false;
    }
    else
    {
     activateInsert.Visible = false;
     activateUpdate.Visible = false;
     deactivate.Visible = false;
    }
  } 
</code></pre>
