This sample demonstrates how to use the Windows Communication Foundation to enable run-time discovery of services within ad-hoc networks using the WS-Discovery protocol.  Clients can search for available services based on a Type and/or Scope (Probe), or search based on a specific Endpoint Reference (Resolve).  A matched service will then respond using a ProbeMatch or ResolveMatch, as appropriate.  New services can also announce their arrival on the network (Hello) or declare their departure from the network (Bye).  These operations are defined as part of the WS-Discovery specification.