C#

<br />
MyCollection myCol = new MyCollection();<br />
myCol.Add(new ObjectInstance());<br />
myCol[0] = new ObjectInstance(); // -> Cancel\throw error on that!<br />

<br />
<br />
You can see at the bottom (before the stars) where the thread is started.  The method below that is being called by the delegate in the code below the stars.  Each set of code is in a diff thread.<br />
<br />
public class MainForm : System.Windows.Forms.Form<br />
	{<br />
          private void search()<br />
          {<br />
<br />
              Search ArtifactSearch = new ArtifactSearch(this);<br />
<br />
              ArtifactSearch.SearchComplete += new Search.ProcessingCompleteDelegate(Search_ProcessingComplete);<br />
            <br />
                Thread StegSearch = new Thread(new ThreadStart(ArtifactSearch.Start));<br />
<br />
                StegSearch.Start();<br />
}<br />
<br />
private void Search_ProcessingComplete()<br />
{<br />
    //this method is being called by the delegate in the StegSearch thread above.<br />
}<br />
<br />
*********************************************************************************************<br />
<br />
        public class Search<br />
	{<br />
                MainForm Parent;<br />
<br />
	        public event ProcessingCompleteDelegate SearchComplete;<br />
		<br />
		public Search(MainForm parent)<br />
		{<br />
			Parent = parent;<br />
		}<br />
<br />
		public void Start()<br />
		{<br />
                   /// Search would take place here<br />
<br />
                   Parent.Invoke(SearchComplete,null);<br />
                }<br />
        }<br />