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Object-oriented Programming in C#
Exception Handling
* Fundamental Questions about Exception Handling
What is the motivation?
What is an error?
What is normal? What is exceptional?
Examples of normal and exceptional aspects
When are errors detected?
How are errors handled?
Where are errors handled?
* Conventional Exception Handling
Exception Handling Approaches
Mixing normal and exceptional cases
* Object-oriented Exception Handling
Errors as Objects
Classification of Errors
* Exceptions and Exception Handling in C#
Exceptions in a C# program
The try-catch statement C#
Handling exceptions in C#
The hierarchy of exceptions in C#
The class System.Exception in C#
Handling more than one type of exception in C#
Propagation of exceptions in C#
Raising and throwing exceptions in C#
Try-catch with a finally clause
Rethrowing an exception
Raising an exception in an exception handler
Comparison with exception handling in Java
* Recommendations about exception handling
Recommendations about exception handling
Recommendations about exception handling
What is normal? What is exceptional?
It is useful to draw the border between normal program aspects and exceptional program aspects
Normal program aspects
Situations anticipated and dealt with in the conventional program flow
Programmed with use of selective and iterative control structures
Exceptional program aspects
Situations anticipated, but not dealt with "in normal ways" by the programmer
Leads to an exception
Recoverable via exception handling. Or non-recoverable
Situations not anticipated by the programmer
Leads to an exception
Recoverable via exception handling. Or non-recoverable
Problems beyond the control of the program
