title: open xml sdk spreadsheet check merged cells
body: <p>I am trying to read an excel spreadsheet via open xml sdk with the following format and determine which 1st row merged cells corrpsond to the 2nd row.</p>
  
  <p>How can I check if a cell is in a merged state?</p>
  
  <pre><code>------------------------------------------------------------
         Main Heading 1     |     Main heading 2              |
  ------------------------------------------------------------
  Sub Head 1   | sub head 2 |     sub head 3                  |
  -------------------------------------------------------------
               |            |                                 |
  </code></pre>