title: How to create a Log with listBox
body: <p>I'm creating a webapp in c# using visual stdio 2008.</p>
  
  <p>In the page there's a button that starts a quite long (about 1 min) processing.
  During this i would like to show what the program is doing in a listbox in the same page but I don't know how to do it beacuse when the process start the page is continuously refreshing so the listbox is always empty even if in the code there are many <code>ListBox.Items.Add("..")</code>.</p>
  
  <p>Hope you can help me.
  (p.s. sorry for my bad english,I'm italian)</p>