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Creating cancelable event 324

Event Properties 325

Chapter 54: Exception Handling 327

Examples 327

Basic Exception Handling 327
Handling specific exception types 327

Using the exception object 327

Finally block 329

Implementing IErrorHandler for WCF Services 330

Creating Custom Exceptions 333

Creating Custom Exception Class 333

re-throwing 333

serialization 334

Using the ParserException 334

Security Concerns 335

Conclusion 335

Exception Anti-patterns 336

Swallowing Exceptions 336

Baseball Exception Handling 336

catch (Exception) 337

Aggregate exceptions / multiple exceptions from one method 338

Nesting of Exceptions & try catch blocks. 339

Best Practices 340

Cheatsheet 340

DO NOT manage business logic with exceptions. 340

DO NOT re-throw Exceptions 341

DO NOT absorb exceptions with no logging 341

Do not catch exceptions that you cannot handle 342

Unhandled and Thread Exception 342
Throwing an exception 343

Chapter 55: Expression Trees 344