Cannot define the property Item on an Expando class. Item is reserved for the expando fields.
A member of an expando class is named Item. This is not allowed because it leads to a conflict with the Item property that is implicitly defined for expando classes.
To correct this error
-
Rename the class member named Item.
See Also
Reference
expando ModifierConcepts
Other Resources
JScript ReferenceClass-based Objects