Sends a message for this session to the message processor. If a direct connection is established the p2p message is directly send to the message processor. If there is no direct connection available, it will wrap the incoming p2p message in a MSGMessage with the correct parameters. It also sets the identifiers and acknowledge session, provided they're not already set.
P2PTransferSession Class | XihSolutions.DotMSN.DataTransfer Namespace