Jump Start State Machine Workflow

#region Using directives

using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using System.Workflow.Runtime;
using System.Workflow.Runtime.Hosting;
using System.Workflow.Activities;

#endregion

namespace FirstWFStateMachine
{
    class Program
    {
        static void Main(string[] args)
        {
            using(WorkflowRuntime workflowRuntime = new WorkflowRuntime())
            {
                AutoResetEvent waitHandle = new AutoResetEvent(false);
                workflowRuntime.WorkflowCompleted += delegate(object sender, WorkflowCompletedEventArgs e) {waitHandle.Set();};
                workflowRuntime.WorkflowTerminated += delegate(object sender, WorkflowTerminatedEventArgs e)
                {
                    Console.WriteLine(e.Exception.Message);
                    waitHandle.Set();
                };

                ExternalDataExchangeService ExDateExchService = new ExternalDataExchangeService();
                workflowRuntime.AddService(ExDateExchService);

                POService poServiceInstance = new POService();
                ExDateExchService.AddService(poServiceInstance);

                WorkflowInstance instance = workflowRuntime.CreateWorkflow(typeof(FirstWFStateMachine.POWorkflow));
                instance.Start();

                
                PO newPO = new PO();
                Console.WriteLine("Please Enter Item Code to be sent Purchase Order of");
                string ItemCode = Console.ReadLine();
                Console.WriteLine("Please Enter Due Delivery Date of Purchase Order of");
                DateTime DueDeliveryDate = Convert.ToDateTime(Console.ReadLine());
                newPO.ItemCode = ItemCode;
                newPO.PODueDeliveryDate = DueDeliveryDate;

                poServiceInstance.CreatePO(instance.InstanceId, newPO);
                Console.WriteLine("New PO created for item: " + newPO.ItemCode + " with Due Delivery Date: " + newPO.PODueDeliveryDate.Date);
                
                

                Console.WriteLine("Do you want to approve Purchase Order");
                while ( (Console.ReadLine().ToLower()) != "y")
                {
                    Console.WriteLine("Current status of Purchase Order : Created");
                    Console.WriteLine("Waiting to be Authorised");
                    DumpStateMachine(workflowRuntime, instance.InstanceId);
                    Console.WriteLine("Do you want to approve Purchase Order");
                }
                poServiceInstance.AuthorisePO(instance.InstanceId, newPO);

                Console.WriteLine("Do you want to send Purchase Order");
                while ((Console.ReadLine().ToLower()) != "y")
                {
                    Console.WriteLine("Current status of Purchase Order : Created");
                    Console.WriteLine("Waiting to be Sent");
                    DumpStateMachine(workflowRuntime, instance.InstanceId);
                    Console.WriteLine("Do you want to send Purchase Order");
                }
                poServiceInstance.SendPO(instance.InstanceId, newPO);
                DumpStateMachine(workflowRuntime, instance.InstanceId);

                System.Console.ReadKey();
                waitHandle.WaitOne();

            }
        }

        private static void DumpStateMachine(WorkflowRuntime runtime, Guid instanceID)
        {
            StateMachineWorkflowInstance instance =
                   new StateMachineWorkflowInstance(runtime, instanceID);

            Console.WriteLine("Workflow ID: {0}", instanceID);
            Console.WriteLine("Current State: {0}",
                      instance.CurrentStateName);
            Console.WriteLine("Possible Transitions: {0}",
                      instance.PossibleStateTransitions.Count);
            foreach (string name in instance.PossibleStateTransitions)
            {
                Console.WriteLine("\t{0}", name);
            }
        }
    }
}