I found this question that is about enabling ligatures in Visual Studio, which appears to be automatic.
However, I don't like ligatures, so I was wondering if it is possible to disable them. I can't find anything in VS2017 or VS2019.
Some time ago Microsoft created "Cascadia Mono" font, which is the same font as default in Visual Studio, but without ligatures.
You can download "Cascadia Mono" font from here: https://github.com/microsoft/cascadia-code/releases
Install this font on your machine, restart Visual Studio, select "Cascadia Mono" font, and you will achieve the same result as "disabling" ligatures in VS.