title: Read the text of the Cell instead of Value
body: <p>I am trying to write a program to compare two excel files in C#. 
  I am able to open the files n read the value of the excel but i would like to compare the text in the Cell. </p>
  
  <p>For example In my sheet, If the Cell A3 is having a formula say "=A1+A2". I am able to retrieve the value using </p>
  
  <pre><code>((Range)worksheet.Cells[2,0]).Value 
  </code></pre>
  
  <p>of A3(the total value of A1 and A2) but not "=A1+A2". How can i get the text.(.Text is always null)</p>
  
  <p>Thanks you</p>