Added support for checking a file content result's textual contents.
Tweaked assertion comment.
Added support for checking a file content result's textual contents using a specific encoding.
Readability tweaks.

Removed superflous using directives.
Moved test method into appropriate region.
Indented if statement (as per code review.)
Removed unintended whitespace between region.
Corrected test name.
Corrected errant test body formatting.