问类型或命名空间名称“”Parse“”在命名空间“”Enum“”中不存在“”

EN

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Enum
{
    public enum ShippingMethod
    {
        RegularMail = 1,
        Registered = 2,
        Express = 3
    }
    class Program
    {
        static void Main(string[] args)
        {
            var method = ShippingMethod.Express;
            Console.WriteLine((int)method);

            var methodId = 3;
            Console.WriteLine((ShippingMethod)methodId);

            Console.WriteLine(method.ToString());

            //Here we take a string and convert it a enum
            var methodName = "Express";
            //We will have to "parse" the string to a different type
            var shippingMethod = (ShippingMethod)Enum.Parse(typeof(ShippingMethod), methodName);

        }
    }
}