ambiguous reference between

• 
  Your question is a bit vague. You didn't provide information as to where you're receiving this error. Is this within Visual Studio itself, a direct command line compile of the code, or otherwise? The likely problem is that you've included a using directive for Excel and System.Windows.Forms and both name spaces contain an entry for 'Button'. This would cause a symbol resolution ambiguity between the two namespaces.
  
  To resolve this issue, either specify the namespace and class-name directly (ala. System.Windows.Forms.Button) or include a few aliases which resolve the ambiguity by introducing a new symbol that's unambiguous, such as:

  using SButton = System.Windows.Forms.Button;
  using EButton = Excel.Button;
  

  Naturally the names you'd use for both cases need to also be unambiguous, or similar problems may result. You can also create a namespace alias like so:

  using E = Excel;
  using Forms = System.Windows.Forms;
  

  Then utilize namespace qualifiers to resolve it in a terser, yet correct, manner (versus the verbose full namespace+class form):
  E::Button or Forms::Button.
  
  That's the furthest I can answer your question given the lack of more information. This is really a forum for support of the Red Gate Reflector program, though.

  Alexander Morou May 03, 2009 08:09

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