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Multi cursor edit is natively supported in Visual Studio starting from version 2017 Update 8. The following is an extract of the documentation:
Ctrl + Alt + click : Add a secondary caret
Ctrl + Alt + double-click : Add a secondary word selection
Ctrl + Alt + click + drag : Add a secondary selection
Shift + Alt + . : Add the next matching text as a selection
Shift + Alt + ; : Add all matching text as selections
Shift + Alt + , : Remove last selected occurrence
Shift + Alt + / : Skip next matching occurrence
Alt + click : Add a box selection
Esc or click : Clear all selections
Some of those commands are also available in the Edit menu