DataSet转换成IList类型

        public IList<Point> GetAllPonitPage(int start, int limit)
         {
string sql = "select top " + limit + "* from Led_Point where Id not in(select top " + start + " Id from Led_Point order by Id asc) order by Id asc";
             SqlDataAdapter sda = new SqlDataAdapter(sql, "server=.;uid=sa;pwd=sa;database=Led2010");
             DataSet ds = new DataSet();
             sda.Fill(ds);
             IList<Point> result = new List<Point>();
for (int j = 0; j < ds.Tables[0].Rows.Count; j++)
             {
                 Point _t = (Point)Activator.CreateInstance(typeof(Point));
                 PropertyInfo[] propertys = _t.GetType().GetProperties();
foreach (PropertyInfo pi in propertys)
                 {
for (int i = 0; i < ds.Tables[0].Columns.Count; i++)
                    {
// 属性与字段名称一致的进行赋值 
                        if (pi.Name.Equals(ds.Tables[0].Columns[i].ColumnName))
                        {
// 数据库NULL值单独处理 
                            if (ds.Tables[0].Rows[j][i] != DBNull.Value)
                                 pi.SetValue(_t, ds.Tables[0].Rows[j][i], null);
else
                                 pi.SetValue(_t, null, null);
break;
                         }
                     }
                }
                 result.Add(_t);
             }
return result;
        }