static void Main(string[] args)
        {
            string[][] Coor;    //存放坐标的二维数组
            Coor = new string[3][];
            TextReader tr = new StreamReader(@"E:\nottingham\study\PRG\Projects\distance_P2P\distance_P2P\Coordinate.txt");
            
            string rd="";
            while ((rd = tr.ReadLine()) != null)
            {
                string[] row = rd.Split(',');
                
            }
            
        }

        string[] rows = File.ReadAllLines(@"E:\nottingham\study\PRG\Projects\distance_P2P\distance_P2P\Coordinate.txt");
        string[][] values = new string[rows.Length][];
        for (int i = 0; i < rows.Length; i++)
            values[i] = rows[i].Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
        //以下是输出各元素的值
        for (int i = 0; i < values.Length; i++)
        {
            for (int j = 0; j < values[i].Length; j++)
                Console.Write(values[i][j] + "    ");
            Console.WriteLine();
        }

------解决方案--------------------
 string[] temp = System.IO.File.ReadAllLines("E:\\aaa.txt", System.Text.Encoding.GetEncoding("gb2312"));
           Dictionary<int, product> dic = new Dictionary<int, product>();
           foreach (string s in temp)
           {
                   string[] pInfo = s.Split(',');
                   int id = int.Parse(pInfo[1]);
                   if (!dic.ContainsKey(id))
                   {
                       product p = new product();
                       p.id = id;
                       p.name = pInfo[2];
                       p.count = int.Parse(pInfo[3]);
                       p.remarks = pInfo[4];
                       dic.Add(id, p);
                   }
           }
           foreach (int i in dic.Keys)
           {
               product p = dic[i];
               Console.WriteLine("Id:{0},name:{1},count:{2},remarks:{3},goodproductNo:{4},badproductNo:{5}", p.id, p.name, p.count, p.remarks, p.goodproductNo, p.badproductNo);
           }