protected void btn_undoClickEvent(object sender, EventArgs e)
 {
     if (Session["recentAddedCompany"] != null)
     {
         var recentCompanies = Session["recentAddedCompany"] as List <DeltoneCRM_DAL.CompanyDAL.CompanyView>;
         var comDal          = new CompanyDAL(CONNSTRING);
         var repId           = Convert.ToInt32(RepNameDropDownList.SelectedValue);
         comDal.DeleteLeadRecentCompanies(recentCompanies, repId);
         Session["recentAddedCompany"] = null;
         undoButton.Visible            = false;
         messagelable.Text             = "Successfully Deleted.";
     }
 }