The try/catch block is a staple of error handling. In PowerShell, one common anti-pattern I see in try/catch blocks is the use of $error.
If you are not familiar with $error, it’s an automatic variable that contains all the error records from the session. It’s a stack, so the last error that occurred is in $error.
I’ve recently seen some public scripts that use $error in the catch block
So what happens if DoSomeLoggingOfContext throws or writes an error? $error will reflect the last error (terminating or non-terminating), so my LogError will be logging the wrong error and the terminating error I caught is lost.
A better option is to use $_ to represent the caught exception.
This ensures that you are referencing the caught error and not just whatever was last on the stack.
Happy Error Handling!