First off, great job with Rider. I'm actually back to enjoying working with my IDE instead of fighting it.
But (always a but) there is one Visual Studio feature I can't seem to find. In VS the top of the class file editor has a navigation bar. It is made up of 3 different combo boxes. The first combo shows you the project you're in; I've never been sure why it is a combo... The second combo will show you the list of classes within the file. The third shows you the list of properties and methods within the selected class of the second combo.
The second and third combos are the ones I am interested in. Currently in Rider I can search for the method name in a file. However being able to quickly navigate within a file via the combos is much more preferred for the cases where you know where you want to go and you just want to get there without digging through search results.