string username, password = ""; 

  ConsoleEx.Clear(); 

  Console.Write("Username: "); 
  username = Console.ReadLine(); 

  Console.Write("Password: "); 
  char c = ConsoleEx.ReadChar(); 
  while (c != '\r')  // carriage return (not new line) 
  { 
   password += c; 
   c = ConsoleEx.ReadChar(); 
   Console.Write('*'); 
  } 

  Console.WriteLine(); 
  Console.WriteLine("Username entered was: {0}; password entered was: {1}", username, password);