static void Main(string[] args)
{
OrderService or = new OrderService();
while (or.p)
{
Console.WriteLine("请输入要进行的操作：");
string action = Console.ReadLine();
switch (action)
{
case "add":
or.Add();
break;
case "delete":
or.Delete();
break;
case "scan":
or.Scan();
break;
case "break":
or.Break();
break;
case "linq":
or.Linq();
break;
}
}
}
