Just in case you ever need to do this…

Go to Tools – Options – Text Editor – All Languages – General and uncheck Auto List Members and Parameter Information.  If you just want to disable intellisense by default for a particular language, go to the Text Editor – <language> – General option page and set the behavior there.

statement completion options unchecked

Note that the intellisense commands themselves are not disabled, meaning you can still invoke intellisense via the keyboard shortcut or a toolbar button.

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