Count on an IEnumerable<dynamic>

Question

I'm using Rob Conery's Massive ORM.

Is there an elegant way to do a count on the record set returned?

dynamic viewModelExpando = result.ViewData.Model;
var queryFromMassiveDynamic = viewModelExpando.TenTricksNewestFirst;

//fails as have actually got TryInvokeMember on it
var z = queryFromMassiveDynamic.Count();

//works
int i = 0;
foreach (var item in queryFromMassiveDynamic) {
    i++;
}

Answer 1

Rather than calling it using the extension method member syntax, try calling the static method directly.

int count = Enumerable.Count(queryFromMassiveDynamic);

Answer 2

The question is a bit off. You're not actually doing a count of an IEnumerable<dynamic>. You're trying a count on a dynamic (which hopefully holds an IEnumerable).

The straightforward way to do this is by using a cast:

 var z = (queryFromMassiveDynamic as IEnumerable<dynamic>).Count();