title: Error for ExcelDataReader
body: <p>I am doing a project in C# and I have downloaded ExcelDataReader from codeplex and added it to my project reference. There is an error in namespace '<code>using Excel;</code>' though I have added <code>Excel</code>, <code>Excel.4.5</code>, <code>Microsoft.Office.Interop.Excel</code> to my project references. I'm getting error where I have written  </p>
  
  <pre><code> IExcelDataReader excelReader = ExcelReaderFactory.CreateOpenXmlReader(stream);
  </code></pre>
  
  <p>The errors are quoted below:</p>
  
  <blockquote>
    <p>The type or namespace name 'ExcelDataReader' could not be found (are
    you missing a using directive or an assembly reference?) The name
    'ExcelReaderFactory does not exist in the current context</p>
  </blockquote>
  
  <p>How to deal with these errors?<br>
  Thank you in advance.</p>
  
  <p>PS:- I have added '<code>using Excel = Microsoft.Office.Interop.Excel</code>' directive as well.</p>