How to add ExcelPackage reference in C#
<p>Please help me: how to add reference for <code>ExcelPackage</code>?</p>

<p>In the following line</p>

<pre><code>using (var excel = new ExcelPackage(FileUpload1.PostedFile.InputStream))
</code></pre>

<p>I'm getting this error:</p>

<blockquote>
  <p>The type or namespace name 'ExcelPackage' could not be found (are you missing a using directive or an assembly reference?)</p>
</blockquote>

<p>I have already called <code>Install-Package DocumentFormat.OpenXml</code> </p>