Custom exception as part in failure exception

Question

I am trying to throw my own native exception from a FaultException from my WCF service and catch it in my WCF client. However, on the client side, the exception is thrown as a non-generic FaultException, and the details of my custom exception are lost.

My own exception:

[Serializable] public class MyCustomException : ApplicationException 
{ ... }

Here's how I throw it:

throw new FaultException<MyCustomException>(new MyCustomException("foo bar!"));

(Note that I have [FaultContract (typeof (MyCustomException))] placed on top of my method in the interface)

And this is how I try to catch it in my client:

...
catch (FaultException<MyCustomException> mcex)
{
    Console.WriteLine(mcex); 
}
 catch (FaultException fex) 
{
    Console.WriteLine(fex); 
}

My goal is for the exception to fall into the first catch clause above, but it falls into the second catch clause.

, MyCustomException ApplicationException, FaultException .

, , MyCustomException Serializable ( DataContractSerializer) , , WCF. - ServiceKnownType? ( , ).

Answer 1

, FaultException , :

[ServiceContract]
interface IYourService
{
   [OperationContract]
   [FaultContract(typeof(MyCustomException))]
   SomeReturnValue YourMethodCall(SomeInputValue input);
}

, , FaultException .

MSDN FaultException<T> WCF.

, [DataContract] ( , [DataMember]):

[Serializable] 
[DataContract]
public class MyCustomException : ApplicationException 
{ ... }