private void copySelectedWorkingSets()
 {
     foreach (ListViewItem workingSetitem in this.WorkingSetsList.CheckedItems)
     {
         WorkingSet workingSet = (WorkingSet)workingSetitem.Tag;
         foreach (ListViewItem userItem in this.userList.CheckedItems)
         {
             User user = (User)userItem.Tag;
             workingSet.copyToUser(user, this.overWriteCheck.Checked);
         }
     }
 }