I used JetBrains for Java (IntelliJ IDEA), Python (PyCharm) and Javascript (WebStorm) and many of the same affordances work across all those languages and I'd expect Rider to do the same.
(Funny I am doing a hackathon this weekend where we are writing a game with Unity and I'm using Visual Studio for the first time in 15 years! It's pretty amazing how big a role C# plays in game development as it is used in many other frameworks like Godot)
Rider is up there with IntelliJ IDEA in its usefulness. If you opt for the package of all of JetBrains' tools, then it's definitely worth a look, IMO. Of course, the full Visual Studio is also pretty nice nowadays, I'll admit that.
As for game engines that support C#/.NET/Mono, there's actually quite a few:
Stride (formerly Xenko) https://doc.stride3d.net/latest/en/manual/scripts/index.html (even the new physics engine they're integrating is written in C#, bepuphysics2, it's really cool how deep into the engine code you can dig, it's like 90% C#)
And a few others (like NeoAxis, that one is really niche, but I think their voxel LOD idea was cool, even if it didn't run well for me). I wonder why Java doesn't see the same level of attention, since the runtime itself is pretty good and the modern versions of the language are reasonably nice, yet for Java it seems that there's only LWJGL and jMonkeyEngine.
That said, .NET is really good even when it comes to webdev, I have to admit that ASP.NET feels way more coherent than working with the likes of Spring Boot in Java sometimes does, I guess I'd say that it's more of a focused and less fragmented experience.
(Funny I am doing a hackathon this weekend where we are writing a game with Unity and I'm using Visual Studio for the first time in 15 years! It's pretty amazing how big a role C# plays in game development as it is used in many other frameworks like Godot)