title: C# how to append text in end of row text file?
body: <p>i have text file like this </p>
  
  <pre><code>IPen ID,Datetime,Status,Data Received
  </code></pre>
  
  <p>is it possible to add some <code>word</code> in end of row. I want append some <code>word</code> so the final result is :</p>
  
  <pre><code>IPen ID,Datetime,Status,Data Received,Data Reply
  </code></pre>
  
  <p>i already browsing and searching, the result only show append text in new line, but thats not what i want, i want append text in end of row. any suggestion for me?</p>