using System;

class CharDemo{

  public static void Main(){
    char ch1 = 'A',         
         ch2 = '\u0041',                                            
         ch3 = '\u00c6', ch4 = '\u00d8', ch5 = '\u00c5',            
         ch6;

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

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

    ch6 = char.Parse("B"); 
    Console.WriteLine("{0} {1}", char.GetNumericValue('3'),         
                                 char.GetNumericValue('a'));        
  }                  

}