Linq查询数据集取得排序后的序列号(行号)

1、测试类 (vs2013)

public class models
    {
        public int id { set; get; }
        public string Name { set; get; }
        public string Phone { set; get; }
        public string Address { set; get; }
        public DateTime Birthday { set; get; }

        public static int idx { set; get; }
        public static int Idx
        {
            get { return models.idx; }
            set { models.idx = 0; }
        }
        public models()
        {
            id = Idx++;
            Name = "Name" + id.ToString();
            Phone = "Phone" + id.ToString();
            Address = "Address" + id.ToString();
            Birthday = DateTime.Now.AddHours(id);
        }

    }

var list = new List<models>();
            list.Add(new models() {id=10,Name="Lucy",Phone="13545147370" });
            list.Add(new models() { id = 10, Name = "Lucy", Phone = "13424241212" });
            list.Add(new models() { id = 29, Name = "Jack", Phone = "13867671212" });
            list.Add(new models() { id = 19, Name = "bobo", Phone = "13987872323" });
            list.Add(new models() { id = 15, Name = "hk", Phone = "13527271818" });
            list.Add(new models() { id = 33, Name = "cy", Phone = "15627271616" });
            var tt = list.OrderBy(p => p.Name).OrderByDescending(p => p.Birthday).OrderByDescending(p => p.id).Select((p, idx) => new
            {
                row=idx,
                name=p.Name,
                phone=p.Phone
            });

            foreach (var item in tt)
            {
                Response.Write(item.row + "====" + item.name + "====" + item.phone);
                Response.Write("<br />");
            }