Okay, I'll bite. What is the string?

Don't keep us hanging like this, what's the string?

Unfortunately I can't share, as it's related to a not-yet-public project.

Do you get the standard reporting error to Microsoft dialog when it crashes? Hopefully someone will be able to look at that. In typical cases only a small summary with the stack is uploaded so your content should not be visible to whoever is looking at the dump.