public class Orders
    {
        public List<string> OrderData { get; }
        public Orders()
        {
            Console.WriteLine("正在加载订单数据...");
            Thread.Sleep(2000); // 模拟耗时
            OrderData = new List<string> { "Order 1", "Order 2", "Order 3" };
            Console.WriteLine("订单数据加载完成。");
        }
    }

using LazyDemo;

class Program
{
    private static Lazy<Orders> orders = new Lazy<Orders>();

    static void Main(string[] args)
    {
        Console.WriteLine("程序启动，Orders对象尚未创建");

        DisplayOrders(orders.Value.OrderData);

    }

    static void DisplayOrders(List<string> orders)
    {
        foreach (var o in orders)
        { 
            Console.WriteLine(o);
        }
    }
}