The calling thread cannot access this object because a different thread owns it.WPF

Question

Whenever I refresh a label, I got this error: The calling thread cannot access this object because a different thread owns it. I tried to invoke b

Answer 1

You can use Dispatcher for this. Your code becomes...

private void imgPayment_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
    Dispatcher.BeginInvoke(DispatcherPriority.Input, new ThreadStart(() =>
    {
        try
        {
            label1.Content = "df";
        }
        catch
        {
            lostfocs ld = new lostfocs(up);
          //  ld.Invoke("df");
            object obj=new object();
            ld.Invoke("sdaf");
        }
    }
));