This inheritance list is sorted roughly, but not completely, alphabetically:

[detail level 1234]

CSteam::Commands::Command	Base type for commands sent to the Steam CM server
CSteam::Commands::AnonymousLogin	Request an anonymous Steam login
CSteam::Commands::ClientLogoff	Request termination of the current Steam user session
CSteam::Commands::GetProductInfo	Request product information for a Steam application
CSteam::Commands::Heartbeat	Send a heartbeat to Steam CM servers to keep sessions alive
CSteam::Events::Event	Base type for all emitted events
CSteam::Events::DisconnectionEvent	Emitted when the TCP connection is dropped
CSteam::Events::MsgNotImplementedEvent	Emitted when a message type is not implemented by the client
CSteam::Events::ProductInfoResult	Result of a product information request
CSteam::Events::ResultEvent	Event containing an operation result
CSteam::Events::ChannelSecuredEvent	Emitted when the channel encryption handshake completes
CSteam::Events::ClientLogonEvent	Result of a client logon attempt
CSteam::Events::EventResult	Result information returned by operations
CSteam::Networking::IConnection	Transport interface used by the CM networking client
CSteam::Networking::TCPConnection
CSteam::Messaging::Packets::IPacketMsg
CSteam::Messaging::Packets::PacketClientMsg
CSteam::Messaging::Packets::PacketClientMsgProtobuf
CSteam::Messaging::Packets::PacketMsg
CSteam::Messaging::Messages::MsgBase
CSteam::Messaging::Messages::MsgBaseHdr< Steam::Internal::MsgHdr >
CSteam::Messaging::ClientMessages::Msg< TBody >
CSteam::Messaging::Messages::MsgBaseHdr< Steam::Internal::MsgHdrProtoBuf >
CSteam::Messaging::ClientMessages::MsgProtoHdr
CSteam::Messaging::ClientMessages::MsgProto< TBody >
CSteam::Messaging::Messages::MsgBaseHdr< THeader >
CSteam::Events::ProductInfoResult::ProductAppInfo	Application information entry
CSteam::Events::ProductInfoResult::ProductPackageInfo	Package information entry
CSteam::SteamClient
CSteam::Utils::VDF::VDFNode	Node in a VDF tree