Is it correct way of calling Workflow 4 in WPF

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C#

WPF

WF

My requirement is: selecting different template(for 4 different user)in WPF using WF4 custom code.As for now i have created only one template per user

I have created a ActivityLibrary,contains codeactivity,activity.xaml + workflowconsoleapplication + WPFapp (to host the workflow)activity.xaml contains 2 arguments one is In and one is out.
Codeactivity contians simple code below.

public sealed class VisitorCodeActivity : CodeActivity<String>
    {
        // Define an activity input argument of type string
        public InArgument<String> Visit { get; set; }
        public OutArgument<String> output { get; set; }

        // If your activity returns a value, derive from CodeActivity<TResult>
        // and return the value from the Execute method.
        protected override String Execute(CodeActivityContext context)
        {  
            string line = Visit.Get(context).ToString();
            return String.Format(" {0} ", Visit.Get(context)); 
        }
    }

WorkflowconsoleApp code:

  namespace VisitorWorkflowConsoleApp
  {
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Enter your visit Number '1' for FirstTime and '2' for Secondtime:");
            try
            {
                string input = Console.ReadLine();                               
                VisitorCodeActivity vca = new VisitorCodeActivity();
                string result = WorkflowInvoker.Invoke<String>(vca);
                Console.WriteLine("{0}", result);
                Console.ReadKey(false);
            }
            catch (Exception ex)
            {
                Console.WriteLine("Result is {0}:{1}", ex.Message, ex.GetType());
            }
        }
    }
}

WPFAPPcode :

public partial class MainWindow : Window
   {
       public MainWindow()
       {
           InitializeComponent();
       }
       private void OncbTypeSelectionChanged(object sender, SelectionChangedEventArgs e)
       {
           string szSelection = Workflowprocess();
           if (szSelection.Trim().Equals("FirstVisit"))
           {
               spPhonenumber.Visibility = Visibility.Hidden;
               gdVisitorDetails.Visibility = Visibility.Visible;
           }
           else
           {
               txtvisiorPassdetails.Visibility = Visibility.Hidden;
               spPhonenumber.Visibility = Visibility.Visible;
               gdVisitorDetails.Visibility = Visibility.Hidden;
           }
       }

       private void OnWindowLoaded(object sender, RoutedEventArgs e)
       {
             cbType.Items.Insert(0, "FirstVisit");
             cbType.Items.Insert(0, "SecondVisit");
       }

       private string Workflowprocess()
       {
           string szoutput = string.Empty;
           string szInput = null;
           szInput = cbType.SelectedValue.ToString();
           if (!string.IsNullOrEmpty(szInput))
           {
               StringWriter writer = new StringWriter();
               try
               {
                   VisitorActivityXaml vaxObj = new VisitorActivityXaml();
                   IDictionary<String, Object> output = WorkflowInvoker.Invoke(vaxObj, new Dictionary<String, Object>
               {
                   {"Visit",szInput},

               });
                   lblDisplay.Content = (String)output["Result"];
                   writer.WriteLine("{0}",output["Result"]);
               }
               catch (Exception ex)
               {
                   Console.WriteLine("Workflow Exception:{0}:{1}", ex.Message, ex.GetType());
               }

                szoutput = writer.ToString();
           }

           return szoutput;
       }

       private void OnbtnGeneratepassClick(object sender, RoutedEventArgs e)
       {
           txtvisiorPassdetails.Visibility = Visibility.Visible;
       }
   }

If it is not the correct way of doing please suggest me correct way with any example.So that i can understand best way of working with WF and WPF.