title: Copy specific columns from one excel spreadsheet to another in C#
body: <p>I have been trying to make a simple app to merge information from one excel spreadsheet to another in c#. But I don't find any reference about how could I do this. </p>
  
  <p><a href="http://i.stack.imgur.com/KtgZR.jpg" rel="nofollow">enter image description here</a></p>
  
  <p>I have the info in one spreadsheet and I need to copy that information in another spreadsheet file.</p>
  
  <p><a href="http://i.stack.imgur.com/OVJ4q.jpg" rel="nofollow">enter image description here</a></p>
  
  <p>How can do this?
  Thanks in advance.</p>