Resharper intelliSense settings

I programming with visual studio 2017 and Resharper 2017. my problem is I like visual studio theme not Resharper.
When I go to Resharper - Option - Environment - General - Source code symbols theme and select visual studio legacy but It maybe uses visual studio 2008 legacy!!! How can I change theme of that?
I try another way and change intelliSense to Visual studio and app say that I can use Resharper with Ctrl+Alt+Space but it doesn't work in some places like this:
Console.WriteLine(now.ToString(""));
I can't get anything with Ctrl+Alt+Space inside of "" of ToString method except I use Resharper intelliSense.
Is it possible to help me?
Thanks a lot.