The number of actual (instantiated) attribute values in this McDBAttributes collection.

A Long value.  

object.Count

The Count Property syntax has these parts:

Only attributes with explict (rather than default) values are included in this property's value, which may be different from the number of names returned by the McDBAttributes enumerator. The enumerator returns the names not only of the instantiated attributes, but also the “suggested” attributes (McDBType.Attributes) associated with the owning McDBNode's associated McDBType (McDBNode.Type).