title: C# can't open excel file
body: <p>When trying to run these lines:</p>
  
  <pre><code>var app = new Excel.Application();
  Excel.Workbook workbook = app.Workbooks.Open(pathToFile, Type.Missing, true, Type.Missing, Type.Missing,
                                                     Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
                                                     Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
  </code></pre>
  
  <p>I've got these problems:</p>
  
  <p>1) I'm getting a message of "file conversion is in progress". Why do I need to convert something if all I want to do is just read a column from one of the work sheets.</p>
  
  <p>2) I'm getting this error message: <img src="https://i.stack.imgur.com/CHWar.jpg" alt="enter image description here"></p>
  
  <p>why do I need to care which version created the excel?</p>
  
  <p>3) In the very end I get an exception: "Too many different cell formats".</p>
  
  <p>So is there something wrong with the way I'm using the open workbook method or is there another way to read a specific column from an excel file which contains several sheets and I only need to read data from a single specific sheet?</p>