How to stop other threads in C#

Question

I have a C# program with this line inside a loop:

Dispatcher.Invoke(updateProgressBar1, System.Windows.Threading.DispatcherPriority.Background, new object[] { ProgressBar.ValueProperty, j });  

when I want to close the application by clicking the close button in the title bar, the application continues to run for a long time... how can I abort the work in the background?? How in general can I close all threads?

Thanks!
Juan

Answer 1

private void ScanFolders(string path)  
        {  
            UpdateProgressBarDelegate updateProgressBar1 = new UpdateProgressBarDelegate(progressBar1.SetValue);  
            string[] folders;  
                folders = Directory.GetDirectories(path);  
            var val = progressBar1.Value;  
  
            progressBar1.Minimum = 0;  
            progressBar1.Value = 0;  
  
            progressBar1.Maximum = folders.Count();  
            for (double j=0; j < folders.Count(); j++)  
            {  
                textBlock1.Text = folders[(int)j];  
                Dispatcher.Invoke(updateProgressBar1, System.Windows.Threading.DispatcherPriority.Background, new object[] { ProgressBar.ValueProperty, j });  
                ScanFolders(textBlock1.Text);  
            }  
            progressBar1.Value = progressBar1.Maximum;  
        }  
  

This is the central function of my small app; is this enough?