title: How to use two different Microsoft Interop assemblies in one project?
body: <p>I want to use two different Microsoft.Office.Interop assemblies (version 11 and 12) depending on the Office version installed on customer's machine.</p>
  
  <p>I've been able to add these two asseblies to my project ( I am using them loccaly - they are in my bin folder, in two diffrent subfolders) , I used aliases on this assemblies to be able to use both of them in my project (respectively, aliases are Excel11 and Excel12).</p>
  
  <p>But unfourtunately, when I am trying to build the solution I am getting warning:</p>
  
  <blockquote>
    <p>No way to resolve conflict between
    "Microsoft.Office.Interop.Excel,
    Version=12.0.0.0, Culture=neutral,
    PublicKeyToken=71e9bce111e9429c" and
    "Microsoft.Office.Interop.Excel,
    Version=11.0.0.0, Culture=neutral,
    PublicKeyToken=71e9bce111e9429c".
    Choosing
    "Microsoft.Office.Interop.Excel,
    Version=12.0.0.0, Culture=neutral,
    PublicKeyToken=71e9bce111e9429c"
    arbitrarily.</p>
  </blockquote>