Iterating through a foreach loop, can we detect the first iteration by using First(), without setting a counter as in:-

@{
  //Check there are slider image page loaded
  var theCount = @Model.Descendants("SliderImagePage").Count();
  
  if (theCount > 0)
    {
        foreach (var theImagePage in Model.Descendants("SliderImagePage"))
          {
           var theImage = theImagePage.Media("sliderImage","umbracoFile");
           if (theImagePage.First() == true) {
            @:<div class="slide" style="background-image:url('@Html.Raw(theImage)');display:block;"></div>
            } else {
            @:<div class="slide" style="background-image:url('@Html.Raw(theImage)');display:none;"></div>
            }
          }    
    
     }
  else
  {
   @: No Picture Image pages set up
  }
  
}

The above doesn't work but I can't work out how it should.

The site is Umbraco V4.7.2 

Any pointers would be helpful.

Thanks

Craig