Password entering without showing up on the console

PasswordInput.cs

string password = "";
string passwordPrompt = "Password: ";
Console.Write(passwordPrompt);
while (true)
{
  ConsoleKeyInfo key = Console.ReadKey(true);
  if (key.Key == ConsoleKey.Enter)
  {
    break;
  }
  else if (key.Key == ConsoleKey.Backspace)
  {
    password = password.Length == 0 ? "" : password.Remove(password.Length - 1, 1);
  }
  else
  {
    password += key.KeyChar;
  }
}
Console.WriteLine();
Console.WriteLine(password);
string unused = Console.ReadLine();