c#手写datatable

DataTable dataTable1 = new DataTable(); 
             dataTable1.Columns.Add("列名");
            dataTable1.Columns.Add("23");
            DataRow dr1 = dataTable1.NewRow();

            dr1["列名"] = "列名";
            dr1["23"] = "23";
            dataTable1.Rows.Add(dr1);
            for (int i = 0; i < 5; i++)
            {
                DataRow dr = dataTable1.NewRow(); 
                dr["列名"] = "sf";
                dr["23"] = "34";
                dataTable1.Rows.Add(dr);
            }  
           //输出测试
            foreach (DataRow row in dataTable1.Rows)
            {
                for (int i = 0; i < dataTable1.Columns.Count; i++)
                {
                    Console.Write(row[i] + " ");
                }
                Console.WriteLine();
            }
            Console.ReadKey();