如何从所有表中选择某一列到C#中的字符串数组

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> columnValues = new List<string>();

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

            string query = "SELECT YourColumnName FROM YourTableName"; // 替换为实际的列名和表名

            using (SqlCommand command = new SqlCommand(query, connection))
            {
                using (SqlDataReader reader = command.ExecuteReader())
                {
                    while (reader.Read())
                    {
                        string columnValue = reader.GetString(0); // 替换为实际的列索引
                        columnValues.Add(columnValue);
                    }
                }
            }
        }

        // 输出结果
        foreach (string value in columnValues)
        {
            Console.WriteLine(value);
        }
    }
}