title: How to use one module from another
body: <p>I have two F# modules, say a module called A in A.fs and B in B.fs. However, when I use module A from module B, F# does not see it. I've tried all combinations of <code>open</code> directives, i.e., <code>open A</code>, <code>open MyNamespace.A</code>, and so on - nothing helps. What am I doing wrong?</p>