What is the meaning of the runtime error - internal CLR error 0x80131506

While I was debugging a simple bit of C#. I got the error 'internal clr error 0x80131506' and the program being debugged crashed. It's .NET Core 3.1 running on Windows 10 x64.

The code wasn't doing much interesting, just calling a method that iterates an array, from another static method in a class, ultimately called by a console application Main method.

I'd be interested to know if there is some way to look up these types of error codes, I couldn't find anything in my search - but perhaps I'm not searching for the correct thing, so any pointers would be appreciated.