Represents a collection of instrument (dynamic and static) properties.

This collection is used in CQGInstrument Object to access the instrument properties (dynamic and static), and in InstrumentChanged Event as a parameter passing the changed properties.
Access to an item in this collection is made by property type.
See Accessing non-existent collection items for details on accessing items that do not exist in the collection.
See the example of InstrumentChanged Event.