public partial class Form1 : Form
    {       
        public Form1()
        {
            InitializeComponent();
            t.UIElement = this;
            Binding binding = new Binding("Text", t, "Count");
            label1.DataBindings.Add(binding);
        }

        Test t = new Test();

        private void button1_Click(object sender, EventArgs e)
        {
            t.Begin();            
        }

    }

    public class Test : System.ComponentModel.INotifyPropertyChanged
    {
        private int m_Count = 0;
        public int Count
        {
            get { return m_Count; }
            set
            {
                m_Count = value;
                NotifyPropertyChanged("Count");
            }
        }

        public void Begin()
        {
            Thread thread = new Thread(Counter);
            thread.IsBackground = true;
            thread.Start();
        }

        private void Counter()
        {
            for (int i = 0; i < 1000; i++)
            {
                if (UIElement!=null&&UIElement.IsHandleCreated)
                {
                    UIElement.BeginInvoke((Action)(() => { Count = i; }));
                }
                System.Threading.Thread.Sleep(100);
            }
        }

        public void NotifyPropertyChanged(string info)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(info));
            }
        }

        public Control UIElement { get; set; }



        #region INotifyPropertyChanged 成员

        public event PropertyChangedEventHandler PropertyChanged;

        #endregion
    }