C#

public partial class MainWindow : Window
   {


       Verdieping etage;

       public MainWindow()
       {
           InitializeComponent();

           Verdieping etage = (Verdieping)0;
           lblHuidigeVerdieping.Content = etage.ToString();
       }

           enum Verdieping: sbyte
       {
           kelder =-1,
           gelijksvloers,
           een,
           twee,
           drie

       }
       void WijzigVerdiepingUp()
       {
           etage++;
           lblHuidigeVerdieping.Content = etage.ToString();

       }
       void WijzigVerdiepDown()
       {
           etage--;
           lblHuidigeVerdieping.Content = etage.ToString();
       }


       private void btnUp_Click(object sender, RoutedEventArgs e)
       {

           WijzigVerdiepingUp();
        }

       private void btnDown_Click(object sender, RoutedEventArgs e)
       {
           WijzigVerdiepDown();
       }
   }

<pre lang="c#">using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Linq;
using Outlook = Microsoft.Office.Interop.Outlook;
using Office = Microsoft.Office.Core;
using System.Drawing;
using System.Diagnostics;
using System.Text.RegularExpressions;
using System.Windows.Forms;
using System.Text.RegularExpressions;


namespace FirstOutlookAddIn
{
    public partial class ThisAddIn
    {
        public static string[] data = new string[10];
        public static Stopwatch timer = new Stopwatch();
        Outlook.NameSpace outlookNameSpace;
        Outlook.MAPIFolder inbox;
        Outlook.Items items;

        private void ThisAddIn_Startup(object sender, System.EventArgs e)
        {

            timer = Stopwatch.StartNew(); ReadMail();
            outlookNameSpace = this.Application.GetNamespace("MAPI");
            inbox = outlookNameSpace.GetDefaultFolder(
                    Microsoft.Office.Interop.Outlook.
                    OlDefaultFolders.olFolderInbox);
            items = inbox.Items;

            items.ItemAdd += new Outlook.ItemsEvents_ItemAddEventHandler(ReadSingleMail); // Modified method to run for single email

        }

        private void ThisAddIn_Shutdown(object sender, System.EventArgs e)
        {
            // Hinweis: Outlook löst dieses Ereignis nicht mehr aus. Wenn Code vorhanden ist, der 
            // ausgeführt werden muss, wenn Outlook geschlossen wird, informieren Sie sich unter http://go.microsoft.com/fwlink/?LinkId=506785
        }

        static void ReadSingleMail(dynamic item)
        {
            string bodyText; // Email body
            string mydocpath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments); //Path to My Documents

            if (item != null)
            {
                bodyText = item.Body;
            }
            else
            {
                return; // If no e-mail body, exit function.
            }
        }

        static void ReadMail()
        {
            //Set up OCR
            string bodyText;
            string mydocpath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);

            //Get unread emails from Inbox
            Microsoft.Office.Interop.Outlook.Application app = null;
            Microsoft.Office.Interop.Outlook._NameSpace ns = null;
            Microsoft.Office.Interop.Outlook.MAPIFolder inboxFolder = null;
            app = new Microsoft.Office.Interop.Outlook.Application();
            ns = app.GetNamespace("MAPI");
            inboxFolder = ns.GetDefaultFolder(Microsoft.Office.Interop.Outlook.OlDefaultFolders.olFolderInbox);
            Outlook.Items unreadItems = inboxFolder.Items.Restrict("[Unread]=true");
            int max_runs;
            //Go through each Unread email
            if (unreadItems.Count > 10) { max_runs = 10; }
            else max_runs = unreadItems.Count;

            for (int counter = 1; counter <= max_runs; counter++)
            {
                //Reinitialize Data array
                for (int index = 0; index <= 8; index++)
                {
                    data[index] = "";
                }
                dynamic item = unreadItems[counter];
                bodyText = item.Body;
                Match match = Regex.Match(bodyText, "Insert searched pattern here");

                if (match.Success)
                {
                    MessageBox.Show(match.Value);
                    match = match.NextMatch();
                }

            }            
        }

        #region Von VSTO generierter Code

        /// <summary>
        /// Erforderliche Methode für die Designerunterstützung.
        /// Der Inhalt der Methode darf nicht mit dem Code-Editor geändert werden.
        /// </summary>
        private void InternalStartup()
        {
            this.Startup += new System.EventHandler(ThisAddIn_Startup);
            this.Shutdown += new System.EventHandler(ThisAddIn_Shutdown);
        }

        #endregion
    }
}