How to use Thread.Sleep in WPF application?

Question

In a WPF application VS 2010, I basically need to print a document and check for errors after few seconds it start to print.

At the moment I am using Thread.Sleep(2000) but it does not work. The try code I believe is running in the UI thread.

Any idea how to fix it? Or better approach?

In this specific case I do not care if the UI Thread is blocked for few seconds.

try
{
    printer = new Printer();
    printer.PrintTicket(dataAdv);
    // check eventual problem during printing like paper jamp
    Thread.Sleep(2000);
    if (monitorPrinter.IsPrinterReady() == false)
    {
        isPrinterReady = false;
        MessageBox.Show("Problem during the printing!!!");
    }
}

Solution

Solution to my problem thanks all for pointing me out in the right direction.

try
{
   printer = new Printer();
   printer.PrintTicket(dataAdv);

   System.Windows.Threading.DispatcherTimer dispatcherTimer = new System.Windows.Threading.DispatcherTimer();
   dispatcherTimer.Tick += new EventHandler(dispatcherTimer_Tick);
   dispatcherTimer.Interval = new TimeSpan(0, 0, 5);
   dispatcherTimer.Start();
}

private void dispatcherTimer_Tick(object sender, EventArgs e)
{
   if (monitorPrinter.IsPrinterReady() == false)
   {
      MessageBox.Show("SOME PROBLEM WHEN PRINTING!");
   }
}