关于数组和字符串相互转换问题

[西门喷血]

现在DataTable有2列值 id,Name
如何转换成一个字符串或者数组
string[,] sarr = { { "aa ", "bb " }, { "ddd ", "eee " }, { "hhh ", "jjj " }, { "9898 ", "92837dk "} };
string[] arr={"aa|bb","cc|dd"}
又如何还原成2列呢？
哪位大侠指点一下。。最好写个例子

[soar_net]

数组在刚声明时就必须有具体的大小
所以建议用ARRAYLIST

using System;
using System.Collections;
using System.Linq;
using System.Text;
using System.Data;

namespace MyTest
{
    class Program
    {
        static void Main(string[] args)
        {
            DataTable tb = new DataTable();
            DataColumn id = new DataColumn("id");
            DataColumn name = new DataColumn("name");
            tb.Columns.Add(id);
            tb.Columns.Add(name);
            DataRow row = tb.NewRow();
            row[0] = "123";
            row[1] = "zr";
            tb.Rows.Add(row);
            ArrayList list = new ArrayList();
            foreach (DataRow tbrow in tb.Rows)
            {
                list.Add(tbrow[0] + "|" + tbrow[1]);
            }
            Console.WriteLine(list[0].ToString().Split('|')[0].ToString());
            Console.WriteLine(list[0].ToString().Split('|')[1].ToString());
            Console.ReadLine();
        }
    }
}

[wuyq11]

for (int i = 0; i < myAr.GetLength(0); i++)
{
for (int j = 0; j < myAr.GetLength(1); j++)
{

}
}