Hi coodey,

I had this same issue and just deicded to work around it as I couldn't see what was causing it (like you say the Umbraco.Web.Dynamics.Grouping object clearly has a Key and Elements property so should work). In the end I created a list of the property I wanted to group by and then lopped through that doing a Children.Where() on the property/value.

Another issue I experienced was trying to get that list of property values to only go through distinct valus - even including @using System.Linq the view would always give an error about there being no Distinct() on List- very odd, so I added a "dealwith" list to act as a filter.

It isn't the prettiest solution but it works for grouping content under headers.

@{
  List<string> dealtWith = new List<string>();
  var categories = CurrentPage.Children().Distinct("category").Pluck("category");
  foreach (var category in categories) {
    if(dealtWith.Contains(category)) { continue; }
    var children = CurrentPage.Children().Where("Category == \""+category+"\"");
    <h3>@category (@children.Count())</h3>
    foreach (var child in children) {
      <h4>@child.Question</h4>
      <div>@child.Answer</div>
    }
    dealtWith.Add(category);
  }
}