title: Read a big Excel document
body: <p>I want to know what is the fastest way to read cells in Excel. 
  I have an Excel file that contains 50000 rows and I wanna know how to read it fast.
  I just need to read the first column and with oledb connection it takes me like 15 seconds.
  Is there a faster way?</p>
  
  <p>Thanks </p>