Tools => Options => Environment => Keyboard => instead of Global scope, use to select Text Editor.
How do I assign duplicate shortcuts?
Visual Studio 2019 - creating shortcuts - In the past this sequence created shortcuts:
Tools => Options => Environment => Keyboard => Apply: Visual Studio Code => Edit.Copy => Use new shortcut in: Global => Ctrl-Insert => Assign.
This no longer works. Ctrl-C still works.
Ditto for paste.
I am able to assign Ctrl+/ to comment and Shift+Ctrl+/ to uncomment. But not copy or paste.
This question was answered per https://social.msdn.microsoft.com/Forums/en-US/d3ceab98-cd31-4a05-a34a-5f9f2d504861/how-do-i-assign-duplicate-shortcuts?forum=visualstudiogeneral.
However, following this procedure, it no longer works. Updating VS 2019 removed all of my shortcuts.