用SqlDataReader返回多个结果集

using System;
using System.Data;
using System.Data.SqlClient;

namespace Northwind
{
    class Program
    {
        static void Main(string[] args)
        {
            SqlConnection sqlConn = null;
            SqlCommand sqlCmd = null;
            SqlDataReader sqlDR = null;
            try
            {
                //创建连接对象,使用集成安全方式连接，更安全
                sqlConn = new SqlConnection(@"data source=localhost;
                   Integrated Security=SSPI;Initial Catalog=northwind");
                //创建命令对象，参数1是存储过程名
                string strSql = @"select categoryid, categoryname from categories;"
                    + @"select employeeId, lastname from employees";
                sqlCmd = new SqlCommand(strSql, sqlConn);
     
                //打开数据库
                sqlConn.Open();
                //执行查询，并将结果集返回给SqlDataReader
                sqlDR = sqlCmd.ExecuteReader();

                //遍历所有的行，直到结束
                do 
                {
                    Console.WriteLine(@"-------------------------------");
                    Console.WriteLine("{0, -15}{1,-15}", sqlDR.GetName(0),
                        sqlDR.GetName(1));
                    Console.WriteLine(@"-------------------------------");
                    while (sqlDR.Read())
                    {
                        Console.WriteLine("{0, -15}${1,-15}", sqlDR.GetInt32(0),
                        sqlDR.GetString(1));
                    }
                    Console.WriteLine();

                } while (sqlDR.NextResult());
                
            }
            catch (System.Exception e)
            {
                Console.WriteLine(e.Message);
            }
            finally
            {
                //关闭SqlDataReader对象
                sqlDR.Close();
                //断开数据库连接
                sqlConn.Close();
            }

        }
    }
}

------------------------------- categoryid     categoryname ------------------------------- 1              $Beverages 2              $Condiments 3              $Confections 4              $Dairy Products 5              $Grains/Cereals 6              $Meat/Poultry 7              $Produce 8              $Seafood

------------------------------- employeeId     lastname ------------------------------- 5              $Buchanan 8              $Callahan 1              $Davolio 9              $Dodsworth 2              $Fuller 7              $King 3              $Leverling 4              $Peacock 6              $Suyama

请按任意键继续. . .