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Visual Studio (2009, not VSCode).
comment lines --> ctrl + K + C
uncomment lines --> ctrl + K + U
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********** For Windows **********
-> How to comment a block?
CTRL + K + CTRL + C
-> How to uncomment a block?
CTRL + K + CTRL + U
********** For Mac **********
-> How to comment a block?
CMD + K + C
-> How to uncomment a block?
CMD + K + U
shortcut key for multi line comment in visual studio
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multi-line comment (/* */) (mac) (works in browser ides too)
shift + option + A