How would I make a Yes/No prompt in Console using C#?

You can easily go overboard on these Console login scripts. Here's my contribution:

bool confirmed = false;
string Key;
do {
    Console.Write("Please enter a login key: ");
    Key = Console.ReadLine();
    Console.WriteLine("You entered, " + Key + " as your login key!");

    ConsoleKey response;
    do
    {
        Console.Write("Are you sure you want to choose this as your login key? [y/n] ");
        response = Console.ReadKey(false).Key;   // true is intercept key (dont show), false is show
        if (response != ConsoleKey.Enter)
            Console.WriteLine();

    } while (response != ConsoleKey.Y && response != ConsoleKey.N);

    confirmed = response == ConsoleKey.Y;
} while (!confirmed);
Console.WriteLine("You chose {0}!", Key);
Console.ReadLine();

Sample output:

Please enter a login key: potato
You entered, potato as your login key!
Are you sure you want to choose this as your login key? [y/n] a
Are you sure you want to choose this as your login key? [y/n] s
Are you sure you want to choose this as your login key? [y/n] l
Are you sure you want to choose this as your login key? [y/n] d
Are you sure you want to choose this as your login key? [y/n] k
Are you sure you want to choose this as your login key? [y/n] f
Are you sure you want to choose this as your login key? [y/n] d
Are you sure you want to choose this as your login key? [y/n] n
Please enter a login key: banana
You entered, banana as your login key!
Are you sure you want to choose this as your login key? [y/n] y
You chose banana!

I remake it like a utils class I hope it's gonna be usefull:

class UtilsConsole
{
        public static bool Confirm(string title)
        {
            ConsoleKey response;
            do
            {
                Console.Write($"{ title } [y/n] ");
                response = Console.ReadKey(false).Key;  
                if (response != ConsoleKey.Enter)
                {
                    Console.WriteLine();
                }
            } while (response != ConsoleKey.Y && response != ConsoleKey.N);

            return (response == ConsoleKey.Y);
        }
}

Use Console.ReadKey();

Console.WriteLine("Press 'y' if you would like awesome!");

ConsoleKeyInfo cki =    Console.ReadKey();

if (cki.Key.ToString() == "y")
{
        //do what you need for yes
}else {
     // presses something other then Y
}