private void buttonExport_Click(object sender, EventArgs e) { buttonExport.Enabled = false; LabelActiveThread.Text = "Exporting! All thread are paused"; Thread_Lock = true; ScrapingWorker worker = null; buttonPause.Text = "Resume"; try { worker = new ScrapingWorker(textBoxOutputFileName.Text, "http://www.zoopla.co.uk/for-sale/property/bl9/?include_retirement_homes=true&page_size=24&q=BL9&new_homes=include&include_shared_ownership=true&search_source=for-sale&radius=0&view_type=grid&pn=2"); } catch (Exception w) { } LabelActiveThread.Text = "List Exported at " + DateTime.Now.ToString("h:mm:ss tt"); try { worker.WriteTheList(); } catch (Exception e1) { MessageBox.Show(e1.Message + "\n\tHow to Solve \n1)Check Your Task Manager if csv File is opened \n2)Check if it is used by another Program"); } // Thread_Lock = false; *----> In case of auto resuming the Threads. }