$OutputStreamMethods
gives the list of output stream methods that can be used.
Details

- $OutputStreamMethods gives the list of possible settings for Method in OpenWrite and OpenAppend.
Examples
Basic Examples (1)
Wolfram Research (2012), $OutputStreamMethods, Wolfram Language function, https://reference.wolfram.com/language/ref/$OutputStreamMethods.html.
Text
Wolfram Research (2012), $OutputStreamMethods, Wolfram Language function, https://reference.wolfram.com/language/ref/$OutputStreamMethods.html.
CMS
Wolfram Language. 2012. "$OutputStreamMethods." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/$OutputStreamMethods.html.
APA
Wolfram Language. (2012). $OutputStreamMethods. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/$OutputStreamMethods.html