Changing pattern dynamically?

[SGarno]

I am trying to write a logger that outputs in different formats (JSON, XML, Text, etc). To do so, I need to initially write out a opening tag, then log the entries, then write a closing tag. I attempted to do this by setting the pattern on instantiation and then during destruction, but I seem to be running into issues, and the set_pattern seems to reset the file.

Can the pattern be changed dynamically?

Edit: It was an oops on my side...I accidentally did not initialize the SizeInMB variable and it ended up writing a new log entry for every record.