How to organize F# source of large project (>300 classes) in Visual Studio?

Question

In C# you can put files in folders corresponding to their namespaces and view them in the Solution explorer.

In F# it seems I have to put everything

Answer 1

You can have folders in F# projects, too. It's a bit cumbersome, but it works.

I think putting multiple classes into one file is perfectly okay and idiomatic in F# if the classes are closely related to each other.

I have not yet worked with really large F# projects, but I'm also interested in the experience of others.