Using checked and unchecked with statement blocks

/*
C#: The Complete Reference 
by Herbert Schildt 

Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/

// Using checked and unchecked with statement blocks. 
 
using System; 
 
public class CheckedBlocks {  
  public static void Main() {  
    byte a, b; 
    byte result; 
 
    a = 127; 
    b = 127; 
  
    try {  
      unchecked { 
        a = 127; 
        b = 127; 
        result = unchecked((byte)(a * b)); 
        Console.WriteLine("Unchecked result: " + result); 
 
        a = 125; 
        b = 5; 
        result = unchecked((byte)(a * b)); 
        Console.WriteLine("Unchecked result: " + result); 
      } 
 
      checked { 
        a = 2; 
        b = 7; 
        result = checked((byte)(a * b)); // this is OK 
        Console.WriteLine("Checked result: " + result); 
 
        a = 127; 
        b = 127; 
        result = checked((byte)(a * b)); // this causes exception 
        Console.WriteLine("Checked result: " + result); // won't execute 
      } 
    }  
    catch (OverflowException exc) {  
      // catch the exception  
      Console.WriteLine(exc); 
    }  
  }  
}

1.	Exception handle with your own exception class
2.	illustrates a custom exception
3.	Demonstrates defining and using a custom exception class
4.	illustrates the use of a System.Exception object
5.	Using Exception members
6.	Use the NullReferenceException
7.	Use a custom Exception for RangeArray errors
8.	Derived exceptions must appear before base class exceptions
9.	calls GetBaseException and outputs the error message of the initial exception.
10.	uses some of the properties of the Exception class
11.	Using checked and unchecked
12.	refines the System.Exception base class with name of the type and time of exception to create your own Exception
13.	Exception Handling: The Exception Hierarchy 1
14.	Exception Handling: The Exception Hierarchy 2
15.	Exception Handling: The Exception Hierarchy 3
16.	Exception Handling User-Defined Exception Classes

Using checked and unchecked with statement blocks : Exception Class « Language Basics « C# / C Sharp

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