Use XOR to encode and decode a message

/*
C#: The Complete Reference 
by Herbert Schildt 

Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
// Use XOR to encode and decode a message. 
 
using System; 
 
public class Encode {  
  public static void Main() { 
    char ch1 = 'H'; 
    char ch2 = 'i'; 
    char ch3 = '!'; 
 
    int key = 88; 
 
    Console.WriteLine("Original message: " + 
                      ch1 + ch2 + ch3); 
 
    // encode the message 
    ch1 = (char) (ch1 ^ key); 
    ch2 = (char) (ch2 ^ key); 
    ch3 = (char) (ch3 ^ key); 
 
    Console.WriteLine("Encoded message: " +  
                      ch1 + ch2 + ch3); 
 
    // decode the message 
    ch1 = (char) (ch1 ^ key); 
    ch2 = (char) (ch2 ^ key); 
    ch3 = (char) (ch3 ^ key); 
    
    Console.WriteLine("Decoded message: " + 
                      ch1 + ch2 + ch3); 
  } 
}

1.	Bit Operators: move
2.	Bit operator
3.	Bit move operator
4.	Bit and, or, xor, not operator
5.	Bit Shift operator
6.	Shift Operators 2
7.	Use bitwise AND to make a number even
8.	Use bitwise AND to determine if a number is odd
9.	Display the bits within a byte
10.	Use bitwise OR to make a number odd
11.	Demonstrate the bitwise NOT
12.	Demonstrate the shift operators
13.	Use the shift operators to multiply and divide by 2
14.	Bitwise operation
15.	Show bits
16.	A class that displays the binary representation of a value
17.	Bitwise Operators 2

Use XOR to encode and decode a message : Operator bitwise « Language Basics « C# / C Sharp

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