Assembly: Microsoft.Rtc.Collaboration (in microsoft.rtc.collaboration.dll)
Syntax
Remarks
By default, this list is populated with extensions understood by the platform. The application can add other extensions it can support. Incoming Invite messages are automatically rejected with a 420 response if they contain a Requires header with an option-tag that is not present in this list.
Thread Safety
All public static (Shared in Visual
Basic) members of this type are thread-safe. Instance members are
not guaranteed to be thread-safe.