public static void CharDemo(){
    char ch1 = 'A',
         ch2 = '\u0041', 
         ch3 = '\u00c6', ch4 = '\u00d8', ch5 = '\u00c5',    // Æ, Ø, Å
         ch6, ch7;

    if (char.IsLetter(ch1))
       Console.WriteLine("{0} is a classificed as a letter", ch1);

    Console.WriteLine("{0} {1} {2}", ch3, ch4, ch5);
    Console.WriteLine("{0} {1} {2}", char.ToLower(ch3), 
                                     char.ToLower(ch4),
                                     char.ToLower(ch5));

    ch7 = char.Parse("B"); 
    Console.WriteLine("{0} {1}", char.GetNumericValue('3'), 
                                 char.GetNumericValue('b'));

    Console.WriteLine("{0}", CharCode('a'));
    Console.WriteLine("{0}", CharCode(ch5));
  }