[teh64]

No both C++ and C# need to be bought as separate IDEs:

Only Clion includes C++: https://www.jetbrains.com/products/compare/?product=idea&pro...

Only Rider includes C#: https://www.jetbrains.com/products/compare/?product=idea&pro...

[jayd16]

Rider handles C++ but it looks like that's only for MSBuild projects.

[memsom]

Only on Windows. For other platforms it has very limited support for the Unreal engine and not much else.

[NomDePlum]

Thanks. I don't use either but good to correct my guess.