如何使用Npgsql从Postgresql中检索UTC DateTime

using Npgsql;
using System;

class Program
{
    static void Main()
    {
        // 连接字符串
        string connString = "Host=your_host;Username=your_username;Password=your_password;Database=your_database";

        // 创建连接
        using (NpgsqlConnection conn = new NpgsqlConnection(connString))
        {
            // 打开连接
            conn.Open();

            // SQL 查询
            string sql = "SELECT created_at FROM your_table WHERE id = @id";

            // 创建命令
            using (NpgsqlCommand cmd = new NpgsqlCommand(sql, conn))
            {
                // 添加参数
                cmd.Parameters.AddWithValue("@id", 1);

                // 执行查询
                using (NpgsqlDataReader reader = cmd.ExecuteReader())
                {
                    if (reader.Read())
                    {
                        // 读取 UTC DateTime
                        DateTime utcDateTime = reader.GetDateTime(0);
                        Console.WriteLine("UTC DateTime: " + utcDateTime);
                    }
                }
            }
        }
    }
}