Verändere den Text in einer TextBox WPF alle 5 Sekunden ab dem Laden des Fensters in CSharp

private void Loaded_Main_Linker(object sender, MouseButtonEventArgs e)
        {
            int slider = 0;
            while (true)
            {
                System.Threading.Thread.Sleep(5000);
                if (slider == 0)
                {
                     TextBox_Slider.Text = "Be successful, with";  
                     slider++
                }
                else
                {
                     TextBox_Slider.Text = "Link your tasks, with";  
                     slider--
                }
            }
        }