Please help on some settings I see in my course

I am doing the course of Rick Davidson
and he have the Red Erorr squiggles when there is an error
(I don’t have the enable option on my settings)

and also he get some highlights when he point on the codes
example:
image

how to enable those things ?

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Welcome to the community!

Depends on the editor you’re using, I’m going to assume your using vscode, In Visual Studio Code, you can enable error checking by installing the appropriate extension for your programming language, such as the C# extension for C# code. You can also check the “Files: Auto Save” setting to make sure that the editor is automatically checking for errors as you type.

A lot of this can be found in visual studios package manager.

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