Terminates the outbound session that indicates that no more messages will be sent from this endpoint on the channel associated with the session.
Assembly: System.ServiceModel (in System.ServiceModel.dll)
Calling signals to the other side of the session that it should return null from any outstanding or subsequent calls made to Receive. CloseOutputSession is idempotent, so calling it again has no effect.
Terminating the outbound session does not affect the incoming session and so makes no statement about the ability to receive messages on the session associated with the input channel.Notes to Implementers
The channel should fault if CloseOutputSession throws an exception.
The implementation of Close on the channel should call CloseOutputSession and then verify that Receive returns null, which indicates that CloseOutputSession was called from the other side of the session.
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