代码

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

namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
//输入用户名
Console.WriteLine("请输入用户名");

        string yonghuming = Console.ReadLine();

        //输入密码
        Console.WriteLine("请输入密码");

        string mima = Console.ReadLine();

        bool b = yonghuming == "admin" && mima == "mypass";
        if (b)
        {
            Console.WriteLine("登录成功");
            Console.ReadKey();

        }

    }
}

}

效果

_JM}M2E0I4(F4S81K{TA5QK.png