LINQ to SQL: intermittent AccessViolationException wrapped in TargetInvocationException

Question

Since a few weeks we are experiencing W3WP-crashes with our ASP.Net web application. These started after our webservers were updated. Our application did not change and has been

Answer 1

I thought I would post a solution, that we found to this issue, because we started experiencing the problem recently.

We have many servers that run our code just fine but only 1 was crashing a couple of times a week with this error. I believe this server was on .net 4.5.2.

We opened a ticket with Microsoft since the unhandled exception was happening in their stack.

They looked at our dump and came back with this solution which worked.

A new fix is available at https://support.microsoft.com/en-us/kb/3139544

It would be better if you move to .net 4.6.1

I hope this solution will help anyone else that finds themselves reading this.