public static List <XL_NhomHang> DocDanhSachNhomHang() { var DanhSach = new List <XL_NhomHang>(); ThuMucNhomHang.GetFiles("*.json").ToList().ForEach(TapTin => { var DuongDan = TapTin.FullName; var Chuoi = File.ReadAllText(DuongDan); var XuLy = new JavaScriptSerializer(); var NhomHang = new XL_NhomHang(); NhomHang = (XL_NhomHang)XuLy.Deserialize(Chuoi, NhomHang.GetType()); DanhSach.Add(NhomHang); }); return(DanhSach); }