C#如何将多个sql数据输出为文本？(单个查询正在工作)

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

namespace SQLtoText
{
    class Program
    {
        static void Main(string[] args)
        {
            string connectionString = "Your_SQL_Connection_String"; // 替换为你的SQL连接字符串
            string query = "SELECT * FROM YourTable"; // 替换为你的SQL查询语句

            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                connection.Open();

                SqlCommand command = new SqlCommand(query, connection);
                SqlDataReader reader = command.ExecuteReader();

                using (StreamWriter writer = new StreamWriter("output.txt")) // 替换为你想要输出的文本文件路径
                {
                    while (reader.Read())
                    {
                        for (int i = 0; i < reader.FieldCount; i++)
                        {
                            writer.Write(reader[i].ToString() + "\t");
                        }
                        writer.WriteLine();
                    }
                }
            }

            Console.WriteLine("数据已成功输出到文本文件。");
            Console.ReadLine();
        }
    }
}