This sample contains two projects: a Windows Forms client and a class library.
Class Library (Server)
The class library defines theCustomerand a set of custom exception classes that are used to expose application-defined errors. The exception classes are related by an inheritance hierarchy. The base class isCRMSystemException, which inherit fromApplicationException.CustomerExceptionandEmployeeExceptioninherit fromCRMSystemException. There are two more exceptions which inherit fromCustomerException:CustomerNotFoundExceptionandCustomerNotDeletedException.Each class exposes different levels of information and functionality.
Client Code
The client application has a reference to the class library. Two command buttons execute methods against theCustomerclass and catch the custom exceptions. A third command button causes an unhandled exception. In addition, there is a check box labeled “Turn on Global Exception Trap” that enables a global exception trap. When enabled, the code defined in theOnThreadExceptionmethod will be executed instead of the default Windows Forms handler.
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