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 private void backgroundWorker1_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e)
        {       
            for (int i = 0; i < 99; i++)
            {
                XDocument doc_de = XDocument.Parse(Properties.Resources.Text);
                int count_knoten = doc_de.XPathSelectElements("//mehrtext").Count();

                backgroundWorker1.ReportProgress((i*100) / count_knoten);
            }
            Thread.Sleep(100);
        }
        private void backgroundWorker1_ProgressChanged(object sender, System.ComponentModel.ProgressChangedEventArgs e)
        {
            progbar.Value = e.ProgressPercentage;
            toolStripStatus_lbl_anzeige.Text = e.ProgressPercentage.ToString() + " %";
        }
        private void backgroundWorker1_RunWorkerCompleted(object sender, System.ComponentModel.RunWorkerCompletedEventArgs e)
        {
            if (progbar.Maximum == progbar.Value)
            {
                progbar.Enabled = false;
                progbar.Value = 0;
            }
        }					

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.ComponentModel;

namespace ConsoleApplication1
{
    class Program
    {
        

        static void Main(string[] args)
        {
            BackgroundWorker back = new BackgroundWorker();
            back.WorkerReportsProgress = true;
            back.DoWork += new DoWorkEventHandler(back_DoWork);
            back.ProgressChanged += new ProgressChangedEventHandler(back_ProgressChanged);
            back.RunWorkerCompleted += new RunWorkerCompletedEventHandler(back_RunWorkerCompleted);
            back.RunWorkerAsync();
            
            Console.Read();
        }

        static void back_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            Console.WriteLine("FERTIG");
        }

        static void back_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            
            Console.WriteLine(e.ProgressPercentage.ToString()+" Prozent");
        }

        static void back_DoWork(object sender, DoWorkEventArgs e)
        {
            BackgroundWorker b = sender as BackgroundWorker;
            Console.WriteLine("IN_DoWork");
            for (int x = 0; x < 100; x++)
            {
                b.ReportProgress((x * 100) / 100);
                //Thread.Sleep(100);
            }
        }
    }
}