1. Exception Handling in C#
Prepared by:
Ezzat Harki
Copyright © 2013 Ezzat Harki

2. What Aim in This presentation
 Introduction to exception
 Advantage for pupil
 Mark for myself
Copyright © 2013 Ezzat Harki

3. What is Exception
 An exception is a problem that arises during the execution of a program. A C#
exception is a response to an exceptional circumstance that arises while a
program is running, such as an attempt to divide by zero.
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4. This mechanism consist of
 Find the problem
 Inform that an error has occurred
 Receive the error information
 Take corrective action
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5. Type of all Exception Class in C# library
Name
Access Violation Exception
AggregateException
AppDomainUnloadedException
ApplicationException
ArgumentException
ArgumentNullException
ArgumentOutOfRangeException
ArithmeticException
ArrayTypeMismatchException
BadImageFormatException
CannotUnloadAppDomainException
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6. Cont.Type of all Exception Class in C# library
Name
ContextMarshalException
DataMisalignedException
DecoderFallbackException
DirectoryNotFoundException
DivideByZeroException
DllNotFoundException
DriveNotFoundException
DuplicateWaitObjectException
EncoderFallbackException
EndOfStreamException
EntryPointNotFoundException
ExecutionEngineException
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7. Cont.Type of all Exception Class in C# library
Name
FieldAccessException
FileLoadException
FileNotFoundException
FormatException
IndexOutOfRangeException
InsufficientExecutionStackException
InsufficientMemoryException
InternalBufferOverflowException
InvalidCastException
InvalidDataException
InvalidOperationException
InvalidProgramException
InvalidTimeZoneException
IOException
Copyright © 2013 Ezzat Harki

8. Cont.Type of all Exception Class in C# library
Name
KeyNotFoundException
MemberAccessException
MethodAccessException
MissingFieldException
MissingMemberException
MissingMethodException
MulticastNotSupportedException
NotFiniteNumberException
NotImplementedException
NotSupportedException
NullReferenceException
ObjectDisposedException
OperationCanceledException
OutOfMemoryException
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9. Cont.Type of all Exception Class in C# library
Name
OverflowException
PathTooLongException
PlatformNotSupportedException
RankException
StackOverflowException
SystemException
TaskCanceledException
TaskSchedulerException
TimeoutException
TimeZoneNotFoundException
TypeAccessException
TypeInitializationException
TypeLoadException
TypeUnloadedException
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10. Cont.Type of all Exception Class in C# library
Name
UnauthorizedAccessException
UriFormatException
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11. In C# Exception Handling is Managed by
that Keyword
 Try
 Catch
 Finally
 Throw
 checked
 Unchecked
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12. Diagram working try & catch
Try block
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Catch block
Statement that
Cause Exception
Statement that
Cause Exception

13. Diagram working try & catch wit Finally
Try block
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finally
Catch blockfinally

14. Coding How to work try & catch with
finallyTry
{
statement;
//statement causing exception
}
Catch(exception type varable)
{
statement;
//error handling code
}
finally
{
//statement to be executed
statement;
}
Copyright © 2013 Ezzat Harki

15. It is Coding Example of Exception
 byte x = 129, y = 129, result;
 try
 {
 result =unchecked ((byte)(x + y));
 Console.WriteLine("The Result is Unchecked ", result);
 //at The Top Line Result is Unchecked But Get Wrong Result Becouse byte always can 256 count
 result =checked((byte)(x + y));
 Console.WriteLine("The Result is Checked ", result);
 //But in This Line Checked Result if Get Overflow Tell you
 }
 catch (OverflowException ovex)
 {
 Console.WriteLine(ovex.Message);
 }
Copyright © 2013 Ezzat Harki

16. Copyright © 2013 Ezzat Harki
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