Exception Handling

The common language runtime supports an exception handling model based on the concepts of exception objects and protected blocks of code. The runtime creates an object to represent an exception when it occurs. You can also create your own exception classes by deriving classes from the appropriate base exception.

You can explicitly throw an exception using the throw statement. You can also throw a caught exception again using the throw statement. It is good coding practice to add information to an exception that is re-thrown to provide more information when debugging.

All languages that use the runtime handle exceptions in a similar manner. Each language uses a form of try/catch/finally structured exception handling. This section provides several examples of basic exception handling.

How to: Use the Try/Catch Block to Catch Exceptions

Describes how to use the try/catch block to handle exceptions.

How to: Use Specific Exceptions in a Catch Block

Describes how to catch specific exceptions.

How to: Create User-Defined Exceptions

Describes how to create your own exception classes.

User-Filtered Exception Handlers

Describes how to set up filtered exceptions.

How to: Use Finally Blocks

Explains how to use the finally statement in an exception block.

Handling and Throwing Exceptions

Provides an overview of common language runtime exceptions.

Exception Class and Properties

Describes the elements of an exception object.

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