LookUpEdit show deleted item
<p>In my application i use LookUpEdit to bound data collection.</p>

<pre><code> List&lt;myClass&gt; lst=new List&lt;myClass&gt;();

 void Init()
 { 
     lst.Add(new myClass("One"));
     LookUpEdit.DataSource=lst;
 }


  class myClass()
  {
     public myClass(string name)
     {
         Name=name;
     }

     public ovveride ToString()
     {
         return Name;
     }
 }
</code></pre>

<p>I choose in LookUpEdit item "One"  and then delete this  item from collection lst. But in LookUpEdit item "One" is shown yet. What is a way to do, that deleted item doesn't show?</p>
