dotnet-wcf

Map [DataContract] types to Protocol Buffer messages, convert [ServiceContract] interfaces to gRPC service definitions, and replace [OperationContract] methods with rpc definitions. Convert duplex contracts to bidirectional streaming and replace ChannelFactory clients with generated gRPC clients.

Stay on WCF when you have active WS-Security, WS-ReliableMessaging, or WS-Transaction requirements, enterprise clients requiring WSDL-based discovery, or named pipes and MSMQ transport dependencies with no modern equivalent.

CoreWCF supports BasicHttpBinding, NetTcpBinding, WSHttpBinding (partial), NetHttpBinding, and WebHttpBinding. It works as a bridge strategy when existing SOAP clients cannot be updated but you need .NET 6+ hosting.

The default maxReceivedMessageSize is 65536 bytes, which causes failures on large payloads. Set an explicit binding configuration with a higher maxReceivedMessageSize and appropriate receiveTimeout and sendTimeout values.

Call Abort() on the client when FaultException, CommunicationException, or TimeoutException occurs, since Close() can throw on faulted channels. On dispose, check the communication state and abort if faulted, otherwise close normally.

WCF [TransactionFlow] has no direct equivalent in gRPC or REST. Use the saga pattern for distributed transactions, the outbox pattern for reliable messaging, idempotency keys for retry safety, or eventual consistency with compensation logic.