Identify the issue when a wrong property tag is used

[naveedkhan8067]

If we have a struct-based property ECStructClass, but in the XML, we incorrectly <ECProperty tag rather than <ECStructProperty then we do not provide good error output.

Test current behavior, is behavior the same in C++ and TypeScript?
Behavior should be the same and both should provide good error output.
If EC version is newer than what the code knows about we should allow unknown types to be loaded (@RohitPtnkr1996 can comment on behavior here). If EC version is known then we should treat unknown types as an error if possible.