title: C# - Add reference for both MS Excel 12.0 object library and MS Excel 14.0 object library?
body: <p>I have recently developed a small tool that uses <code>Microsoft.Office.Excel.Interop</code>, and according to my References folder I have added the reference to the Microsoft Excel 14.0 Object Library. I should also mention that I have MS Office 2010 on my machine, so the tool works just fine there.</p>
  
  <p>However I have a client user that is trying to install the tool on his machine (apparently he has MS Office 2003 installed) and is getting an error message.</p>
  
  <p>I was wondering, would there be any issues if I download the Microsoft Excel 12.0 Object Library and also add its Reference into my tool so that I have references to both, MS Excel 14 and MS Excel 12? ... would doing that even make sense?</p>
  
  <p>Again, I'm fairly new to .NET and my programming experience is purely empirical, as in no school. Just a heads up in case this is a stupid question.</p>
  
  <p><strong>EDIT:</strong> </p>
  
  <p>I found something that seems to solve this problem. I had my client download the file from this link: <a href="http://www.microsoft.com/en-us/download/details.aspx?id=3508" rel="nofollow">http://www.microsoft.com/en-us/download/details.aspx?id=3508</a></p>
  
  <p>Then just follow the instructions at the bottom, and this apparently solved the problem. He was able to install the tool and run it without issues.</p>