C# Seminar based on Role of .NET in Exception Handling presented by Asrarulhaq Maktedar as a seminar topic. The Short PowerPoint Presentation will help you to understand the role of .NET in exception handling

1. ROLE OF .NET
IN EXCEPTION
HANDLING
BY
ASRARULHAQ MAKTEDAR

2. ERRORS, BUGS
& EXCEPTION
Errors: These are caused by end-user of the
application.
For Ex: entering un-expected value in a textbox, say
USN.
Bugs: These are caused by the programmer.
For Ex: → making use of NULL pointer or
→ referring array-index out of bound
Exceptions: These are regarded as runtime anomalies
that are difficult to prevent.
For Ex: → trying to connect non-existing database
→ trying to open a corrupted file
→ trying to divide a number by zero

3. THE ROLE
OF .NET
EXCEPTION
HANDLING
Programmers have a well-defined
approach to error handling which is
common to all .NET aware languages.
Identical syntax used to throw &
catch exceptions across assemblies,
applications & machine boundaries.
Exceptions are objects that contain a
human readable description of the
problem.
The end-user can be provided with
the help-link information.
Help-link information point to a URL
that provides detailed information
regarding error at hand.

4. THE ATOMS
OF .NET
EXCEPTION
HANDLING
• Programming with structured exception
handling involves the use of 4 key elements:
• i) A 'type' that represents the details of the
exception that occurred.
• ii) A method that throws an instance of the
exception-class to the caller.
• iii) A block of code that will invoke the
exception-ready method (i.e. try block).
• iv) A block of code that will process the
exception (i.e. catch block).
• C# offers 4 keywords {try, catch, throw and
finally} that can be used to throw and handle
exceptions.
• The type that represents the problem at
hand is a class derived from
System.Exception.

5. CORE MEMBERS OF SYSTEM.EXCEPTION
TYPE
Member Meaning
Message This returns textual description of a given error. The
error-message itself is set as a constructor-parameter.
TargetSite This returns name of the method that threw the exception.
Source This returns name of the assembly that threw the exception.
HelpLink This returns a URL to a help-file which describes the error in
detail.
StackTree This returns a string that identifies the sequence of calls that
triggered the exception.
InnerException This is used to obtain information about the previous
exceptions that causes the current exception to occur.