background worker error

namespace WindowsFormsApplication21
{
    public partial class Form1 : Form
    {
        BackgroundWorker Worker=new BackgroundWorker();

        public Form1()
        {
            InitializeComponent();
            InitializeBackGroundWorker();
        }

        private void InitializeBackGroundWorker()
        {
          //  Worker = new BackgroundWorker();
            Worker.DoWork += new System.ComponentModel.DoWorkEventHandler(Worker_DoWork);
            Worker.ProgressChanged += new System.ComponentModel.ProgressChangedEventHandler(Worker_ProgressChanged);
            Worker.RunWorkerCompleted += new System.ComponentModel.RunWorkerCompletedEventHandler(Worker_RunWorkerCompleted);
            Worker.WorkerReportsProgress = true;
            Worker.WorkerSupportsCancellation = true;
        }


        void Worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            if (e.Error != null)
                label1.Text = e.Error.Message;

            else if(e.Cancelled)
                label1.Text="BackGroundWorker Canceled";

            label1.Text = "BackGroundWorker Complete.";
          
        }

        void Worker_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            progressBar1.Value = e.ProgressPercentage;
        }

        void Worker_DoWork(object sender, DoWorkEventArgs e)
        {

            Worker = new BackgroundWorker();  

           BackgroundWorker worker=sender as BackgroundWorker;
           if (worker.CancellationPending)
           {
               e.Cancel = true;
               return;
           }


           label1.Text = "BackGroundWorker Started.";//Error Cross-thread operation not valid: Control 'label1' accessed from a thread other than the thread it was created on.
            System.Threading.Thread.Sleep(1000000);
            Timer timer =new Timer();
            timer.Interval=1000000;
            timer.Start();
          while (true)
	       {
               if (timer.Interval == 0) break;

               Worker.ReportProgress(timer.Interval * 100 / 100); //Raise the ProgressChanged event.
	       }

            


        }


        private void button2_Click(object sender, EventArgs e)
        {
            while(true)
            {


            }
        }

        private void button1_Click(object sender, EventArgs e)
        {

            button1.Enabled = true;
            progressBar1.Value = 0;
            Worker.RunWorkerAsync();

        
        }

        private void button3_Click(object sender, EventArgs e)
        {
            Worker.CancelAsync();
            button3.Enabled = false;
        }
    }
}