List of exceptions that CAN’T be caught in .NET

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The only exception that cannot be caught directly is (a framework thrown) StackOverflowException. This makes sense, logically, as you don’t have the space in the stack to handle the exception at that point. From the docs:

Starting with the .NET Framework version 2.0, a StackOverflowException object cannot be caught by a try-catch block and the corresponding process is terminated by default.

ThreadAbortException can be caught, but will always get re-raised, so has unique behavior. From the docs:

ThreadAbortException is a special exception that can be caught, but it will automatically be raised again at the end of the catch block.

Also note that some AccessViolationException instances are corrupted state exceptions, and may not get handled by default. These can be handled, but require extra handling via attributes. For details, see Handling Corrupted State Exceptions.

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