Gets or sets the value for key. Setting Instance removes the entry. Setting marks the
dictionary dirty.
[SuppressMessage("Design", "CA1043:Use integral or string argument for indexers", Justification = "Dictionary keys are names (ISO 32000-2 §7.3.7); this is the IDictionary indexer.")]
public CosObject this[CosName key] { get; set; }
The key.