title: Winform application freeze
body: <p>I have Winform application,which does some operation in loops (file access, copy file, ....). During theses operation, the application freeze completely, the job is done but impossible to move the <strong>main window</strong> or refresh the <code>RichTextBox</code> information (we display errors and the job in progress).</p>
  
  <p>Do you have an idea how to do this ?</p>
  
  <p>Thanks,</p>