public void BeginEchoBinary(byte[] aValue, CallbackAsyncComplete aCallback) { Invocation invocation = iService.Invocation(iActionEchoBinary, aCallback); int inIndex = 0; invocation.AddInput(new ArgumentBinary((ParameterBinary)iActionEchoBinary.InputParameter(inIndex++), aValue)); int outIndex = 0; invocation.AddOutput(new ArgumentBinary((ParameterBinary)iActionEchoBinary.OutputParameter(outIndex++))); iService.InvokeAction(invocation); }