private void btOK_Click(object sender, EventArgs e)
 {
     if (_webSite != null)
     {
         List <OutputFolder> fs = new List <OutputFolder>();
         for (int i = 0; i < checkedListBox1.Items.Count; i++)
         {
             OutputFolder f = checkedListBox1.Items[i] as OutputFolder;
             f.Disabled = !checkedListBox1.GetItemChecked(i);
             fs.Add(f);
         }
         _prj.SetOutputFolders(fs);
         _prj.SaveTestWebSite(_webSite);
         this.DialogResult = DialogResult.OK;
     }
     else
     {
         MessageBox.Show(this, "Test web site is not created.", Text, MessageBoxButtons.OK, MessageBoxIcon.Error);
     }
 }