字典中的保护级别错误

Question

我收到此错误消息"由于其保护级别无法访问"在最后一行,但我已检查,一切似乎是公开的.可能有什么不对？

using System;
using System.Collections.Generic;

namespace Test
{
    class Sneakers
    {

        public string _brand;
        public Sneakers(string brand)
        {
            _brand = brand;
        }
        public string Show()
        {
            return "The brand is: " + _brand;
        }
        public static string Show(Sneakers mySneak)
        {
            return mySneak.Show();
        }
    }
    class Program
    {
        static void Main(string[] args)
        {

            Sneakers mySneak = new Sneakers("Nike");

            Dictionary<Sneakers, double> collection = new Dictionary<Sneakers, double>();
            collection.Add(mySneak, 10);

            foreach (KeyValuePair<Sneakers, double> item in collection)
            {
                Console.WriteLine(Sneakers.Show(item.key));//HERE IS THE ERROR IN "key"
            }
        }
    }
}

Answer 1

使用密钥不是密钥

Console.WriteLine(Sneakers.Show(item.Key));