title: when using iText, how to SetPdfVersion in C#?
body: <p>The document in the official site shows that the SetPdfVersion  is as below:</p>
  
  <pre><code>public void setPdfVersion(char version)
  </code></pre>
  
  <p>It's java version.So I can call it like below:</p>
  
  <pre><code>PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(RESULT));
  writer.setPdfVersion(PdfWriter.VERSION_1_7);
  </code></pre>
  
  <p>So when I want to use it in C#, I found that the setPdfVersion's signature is </p>
  
  <pre><code> public virtual void SetPdfVersion(PdfName version);
  </code></pre>
  
  <p>There's no document about this function in C#, So how can I do it with c#?</p>