I found an answer here :
How to set the color of matching braces in VS 2015?
They mentioned that this is a known issue and is on the list to get fixed but it's right now available in Visual Studio 2017 Version 15.9. You can use Visual Assist options
The developer community of VS answered: "Thank you for your feedback! We have fixed the problem in an upcoming release. We believe this was a perf issue (as that operation can frequently be canceled), which should be much quicker when the 15.8 version of VS2017 ships."
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