How to handle a System.AccessViolationException?

Question

I use the external C library in my program encoded in C ++ / CLI with the .NET framework 4. Sometimes lib fails and I get the message:

Unhandled exception: System.AccessViolationException: attempt to read or write protected memory.

So I tried to process it with a try / catch block:

try { Init(); //< lib call which sometimes crashes } catch (Exception^ e) { // handle the error } 

But the exception remains undetected: my program crashes before entering the catch block.

How can I handle this exception to prevent my program from crashing?

Answer 1

For clarity, I copy / paste the answer provided in the Flot2011 comments here:

There are several ways around this:

• Recompile as a .NET 3.5 assembly and run it in .NET 4.0.
• Add a line to the application configuration file in the configuration / runtime item: <legacyCorruptedStateExceptionsPolicy enabled="true|false"/>
• Decorate the methods you want to catch in these exceptions with the HandleProcessCorruptedStateExceptions attribute. See this article for more details.