高品質な進行状況ダイアログを作成するには？

public partial class WaitForm : Form {
	public WaitForm() {
		InitializeComponent();
	}

	public void ProcessWorks(IWin32Window owner) {
		MethodInvoker invoker = delegate {
			for(int i = 0;i < 10;i++) {
				System.Threading.Thread.Sleep(1000);
				this.Invoke(new MethodInvoker(delegate {
					progressBar.PerformStep();
				}));
			}
			this.Invoke(new MethodInvoker(delegate {
				this.DialogResult = DialogResult.OK;
			}));
		};
		invoker.BeginInvoke(delegate(IAsyncResult r) {
			invoker.EndInvoke(r);
		}, null);
		this.ShowDialog(owner);
	}
}