How to:Determine the Discovery Version of a Probe Request
A discovery proxy may expose multiple discovery endpoints using different discovery versions. When a UDP multicast Probe request arrives at the proxy, the proxy should respond with a multicast suppression message. In order to do this, it would have to know the discovery version of the request.
To Determine the Discovery Version of a Probe Request
In the method that responds to a Probe request (for example DiscoveryProxy.OnBeginFind) use the static OperationContext.Current property to search for a DiscoveryOperationContextExtension, as shown in the following code.
DiscoveryOperationContextExtension doce = OperationContext.Current.Extensions.Find<DiscoveryOperationContextExtension>();
// Access the discovery version from the DiscoveryOperationContextExtension
doce.DiscoveryVersion;