title: How do I reference types or modules defined in other F# files?
body: <p>I have the following in a .fs file:</p>
  
  <pre><code>namespace fsHoldem
  
  module holdemPlayer
  
  type Player()=
    ... etc...
  </code></pre>
  
  <p>and I'm trying to reference the type Player in another file.  I've tried using open:</p>
  
  <pre><code>namespace fsHoldem
  
  module BetStrategies
  
  open fsHoldem.holdemPlayer       
  </code></pre>
  
  <p>but I'm getting the error "Namespace or module 'fsHoldem' is not defined."</p>
  
  <p>Note that both .fs files share the same namespace, and both exist in the same project.</p>