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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.ComponentModel;

namespace whiletest
{
    /// <summary>
    /// Interaktionslogik für MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            var worker = new BackgroundWorker();
            worker.DoWork += worker_DoWork;
            worker.RunWorkerAsync();
        }
        private void worker_DoWork(object sender, DoWorkEventArgs e)
        {
            int i = 0;
            this.Dispatcher.BeginInvoke(new Action(delegate()
            {
                while (Convert.ToInt32(textBox1.Text) < Convert.ToInt32(textBox2.Text))
                {
                    textBox1.Text = i.ToString();
                    i++;
                }
            }));
        }

        private void button2_Click(object sender, RoutedEventArgs e)
        {
            MessageBox.Show("Ich bin eine MessageBox");
        }
    }
}