我想在c#中存储sql select语句的返回值

using System;
using System.Collections.Generic;
using System.Data.SqlClient;

public class Program
{
    public static void Main()
    {
        string connectionString = "YourConnectionString"; // 替换为实际的数据库连接字符串

        List<string> results = new List<string>(); // 使用列表存储查询结果

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

            string sqlQuery = "SELECT column1, column2 FROM YourTable"; // 替换为实际的表和列名

            using (SqlCommand command = new SqlCommand(sqlQuery, connection))
            {
                using (SqlDataReader reader = command.ExecuteReader())
                {
                    while (reader.Read())
                    {
                        string value1 = reader.GetString(0); // 获取第一个列的值
                        string value2 = reader.GetString(1); // 获取第二个列的值

                        string result = value1 + " - " + value2;
                        results.Add(result);
                    }
                }
            }

            connection.Close();
        }

        // 现在，results列表中存储了查询结果的每一行数据
        foreach (string result in results)
        {
            Console.WriteLine(result);
        }
    }
}