protected void Button1_Click(object sender, EventArgs e)
 {
     try
     {
         Whitfieldcore wCore = new Whitfieldcore();
         for (int i = 0; i < leftlist.Items.Count; i++)
         {
             if (leftlist.Items[i].Selected)
             {
                 wCore.InsertRight(Convert.ToInt32(ViewState["twcProjNumber"].ToString()), leftlist.Items[i].Value);
             }
         }
         DisplayListBoxValues();
     }
     catch (Exception ex)
     {
         Response.Write(ex.Message);
     }
 }