c# - Are FaultExceptions handled differently in .NET 4 than in .NET 4.5? -


we experiencing different behavior on our clients when handling faultexceptions thrown our wcf service depending on version of .net framework.

the service defines custom fault:

[datacontract] public class myfault {     [datamember]     public int myid { get; set; } }

the interface of service:

[servicecontract] public interface imyservice {     [operationcontract]     [faultcontract(typeof(myfault))]     myresponse dosomething(myrequest request); }

the client handles exception:

try  {     client.dosomething(myrequest); }  catch (faultexception<myfault> ex)  {     ... }

on .net 4.5 machine recognise fault faultexception<myfault> , handle expected.

however, on .net 4 machine treat fault faultexception (non-generic), catch never reached.

we captured traffic on machines see if there differences in communication. both, request , response identical. updated .net 4 machine .net 4.5 (without updating other software or our client software) , behavior changed.

is there logical explanation?


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