前台如何获取后台声明的二维数组

   public string[,] getSource()
        {
            MyService.MyServiceClient client = new MyService.MyServiceClient();
            DataSet ds = new DataSet();
            ds = client.ScheduleGetList("");
           // List<MyService.Schedule> list = new List<MyService.Schedule>();
            MyService.Schedule schedule = new MyService.Schedule();
            string[,] list = new string[ds.Tables[0].Rows.Count,3];
            for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
            {
                list[i,0] = ds.Tables[0].Rows[i][1].ToString();
                list[i,1] = ds.Tables[0].Rows[i][2].ToString();
                list[i,2] = ds.Tables[0].Rows[i][3].ToString();
            }
            return list;
        }