#代码

string name = "";

string pwd = "";

do

{

Console.WriteLine("请输入用户名");

name = Console.ReadLine();

Console.WriteLine("请输入密码");

pwd = Console.ReadLine();

if (name != "admin" || pwd != "888888")

{

Console.WriteLine("用户名或密码错误");

}

}

while (name != "admin" || name != "888888");

Console.ReadKey();

#效果

图片发自简书App