Is it possible to Italicize an underscore?

Description

When italicizing a filename that includes an underscore, underscore is not displayed and Italics is instead toggled off.

That is: file_name should be italicized by using file_name whereas the middle underscore is not shown and instead turns off italics.

Is it possible to escape the underscore so it allows the surrounding text to be italicized?
Noting the html here is stripping off the enclosing underscores but is showing italicization