Using V 6.1.6.

I am trying to filter children of the current node in my View and I was hoping to do something like below using LINQ but the code will not compile because the GetPropertyValue is unrecognised.

Umbraco.TypedContent(CurrentPage.Id).Children.Where(n => 
String.Equals(n.GetPropertyValue<string>("cat1"), formCat1, StringComparison.CurrentCultureIgnoreCase) || 
String.Equals(n.GetPropertyValue<string>("cat2"), formCat2, StringComparison.CurrentCultureIgnoreCase) || 
String.Equals(n.GetPropertyValue<string>("cat3"), formCat3, StringComparison.CurrentCultureIgnoreCase));

I get a

CS1977: Cannot use a lambda expression as an argument to a dynamically dispatched operation without first casting it to a delegate or expression tree type.

I have seen a few other topics in the forum where the above works (GetProperty within a lambda).  What am I missing? How would you usually filter a list of this type either in a  view or in a partial view?

J