C#

<script>

var waitwin ;

function waitwindow()
{
   waitwin = open('',"","width=10,height=10,left=400,top=100,scrollbars=0")
   waitwin.document.open();
   waitwin.resizeTo(1, 1); 
}
</script>

<script>
   waitwindow();
   waitwin.document.write('< p align="center">Please Wait< /p>');
</script>

<script>
   waitwin.close();
</script>

public class Test
{
  public static int Main(String[] args)
  {
    ArrayList b = new ArrayList();
    ArrayList c = new ArrayList();
    if( true )
    {
      IEnumerator lenum = b.GetEnumerator();
      while( lenum.MoveNext() )
      {
        int j = 0;
        j++;
      }
    }
    { //see no problem now
      IEnumerator lenum = c.GetEnumerator();
      while( lenum.MoveNext() )
      {
        int j = 0;
        j++;
      }
    }
    return 0;
  }
}

IEnumerable nodes;
....

for (IEnumerator enumer = nodes.GetEnumerator(); enumer.MoveNext(); )
{
  object node = enumer.Current;
  ...
}

XmlDataDocument doc = new XmlDataDocument();
doc.DataSet.ReadXmlSchema("schema.xsd");
doc.Load("mydataset.xml");