Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 12]

▼NMusicBrainz
CArtist	Represents an artist
CArtistAlias	Represents an artist alias
CArtistFilter	A filter for the artist collection
CArtistIncludes	A specification on how much data to return with a track
CArtistResult	Represents an artist result
CAuthenticationError	Authentication failed
CConnectionError	Getting a server connection failed
CDefaultFactory	A factory to instantiate classes from the domain model
CDisc	Represents an Audio CD
CDiscError	The Audio CD could not be read
CEntity	A first-level MusicBrainz class
CException
CIFactory	A factory to instantiate classes from the domain model
CIFilter	A filter for collections
CIIncludes	An interface implemented by include tag generators
CIWebService	An interface all concrete web service classes have to implement
CLabel	Represents a record label
CLabelAlias	Represents a label alias
CMbXmlParser	A parser for the Music Metadata XML format
CMetadata	Represents a parsed Music Metadata XML document
CParseError	Exception to be thrown if a parse error occurs
CQuery	A simple interface to the MusicBrainz web service
CRelation	Represents a relation between two Entities
CRelease	Represents a Release
CReleaseEvent	A release event, indicating where and when a release took place
CReleaseFilter	A filter for the release collection
CReleaseIncludes	A specification on how much data to return with a release
CReleaseResult	Represents an release result
CRequestError	An invalid request was made
CResourceNotFoundError	No resource with the given ID exists
CResponseError	The returned resource was invalid
CResult	Represents generic search result
CTag
CTimeOutError	Connection to a server timed out
CTrack	Represents a track
CTrackFilter	A filter for the track collection
CTrackIncludes	A specification on how much data to return with a track
CTrackResult	Represents an track result
CUser	Represents a MusicBrainz user
CUserFilter	A filter for the user collection
CValueError
CWebService	An interface to the MusicBrainz XML web service via HTTP
CWebServiceError	A web service error has occurred