NServiceBus/NServiceBus — pull request #1187 by kstrauss (2013-05-17 20:07:07+00:00)
Title: Added logging to explain why an exception is being thrown

If a sender uses unobtrusive mode and the receiver has not then
an exception about a missing key is thrown, which is not informative as to how to fix things. Added a check and logging to suggest looking at adding unobtrusive mode.