C# if选择结构

using System;

namespace test
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
            string name, password;
            Console.WriteLine("请输入你的用户名:");
            name= Console.ReadLine();
            Console.WriteLine("请输入密码:");
            password= Console.ReadLine();
            if (name == "admin" && password == "88888")
            {
                //name与password都成立时运行
                Console.WriteLine("成功！");
            }
            else
            {
                if (name != "admin") {
                    Console.WriteLine("用户名不存在");
                }
                else
                {
                    Console.WriteLine("密码错误。");
                }
            }
            Console.Read();
        }
    }
}

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