public class ExceptionActivity:CodeActivity
    {
        protected override void Execute(CodeActivityContext context)
        {
            ;
             / a;
        }
    }

static void ExceptionActivityWorkflow_None()
        {
            WorkflowApplication instance = new WorkflowApplication(new ExceptionActivityWorkflow());
            instance.Completed = workflowCompleted;
            instance.Aborted = aborted;
            instance.Run();
        }
private static void aborted(WorkflowApplicationAbortedEventArgs obj)
        {
            Console.WriteLine("aborted,实例编号：{1},Reason:{0}", obj.Reason.Message, obj.InstanceId);
        }

        static void workflowCompleted(WorkflowApplicationCompletedEventArgs e)
        {
            Console.WriteLine("完成，实例编号：{0},状态：{1}", e.InstanceId, e.CompletionState.ToString());
        }

不用[OnUnhandledException]方法处理异常时,流程正常结束.调用实例的[completed],状态为[faulted]

static void ExceptionActivityWorkflow_Abort()
        {
            WorkflowApplication instance = new WorkflowApplication(new ExceptionActivityWorkflow());
            instance.Completed =workflowCompleted;
            instance.OnUnhandledException = unhandledException_Abort;
            instance.Aborted = aborted;

            instance.Run();
        }

        static UnhandledExceptionAction unhandledException_Abort(WorkflowApplicationUnhandledExceptionEventArgs e)
        {
            System.Console.WriteLine("unhandledException_Abort:{0}", e.UnhandledException.Message);
            return UnhandledExceptionAction.Abort;
        }

        private static void aborted(WorkflowApplicationAbortedEventArgs obj)
        {
            Console.WriteLine("aborted,实例编号：{1},Reason:{0}", obj.Reason.Message, obj.InstanceId);
        }

        static void workflowCompleted(WorkflowApplicationCompletedEventArgs e)
        {
            Console.WriteLine("完成，实例编号：{0},状态：{1}", e.InstanceId, e.CompletionState.ToString());
        }

用[UnhandledExceptionAction.Abort]方式处理异常时,流程被结束.不会调用实例的[completed],会调用实例的[Aborted]

static void exceptionActivityWorkflow_Terminate()
        {
            WorkflowApplication instance = new WorkflowApplication(new ExceptionActivityWorkflow());
            instance.Completed = workflowCompleted;
            instance.OnUnhandledException = unhandledException_Terminate;
            instance.Aborted = aborted;
            instance.Run();
        }

        static UnhandledExceptionAction unhandledException_Terminate(WorkflowApplicationUnhandledExceptionEventArgs e)
        {
            System.Console.WriteLine("unhandledException_Abort:{0}", e.UnhandledException.Message);
            return UnhandledExceptionAction.Terminate;
        }

用[UnhandledExceptionAction.Terminate]方式处理异常时,流程正常结束.会调用实例的[completed],但状态为[faulted]