title: Visual Basic Append to a specific point in a text file
body: <p>I am currently trying to manipulate a line in a file that we are using to retain data, using comma delimiters. For example - </p>
  
  <pre><code>121,1212, XJAY,Sean K,Kean S,AAAA-BBBB-AAAA-BBBB-AAAA
  12456,987654,WYST,Steve Jobs,Bill Gates,CAAA-BBBB-AAAA-BBBB-AAAA
  </code></pre>
  
  <p>If I assume that the last line is always a unique code, is it possible to identify that line in the text file and append it with another field?</p>
  
  <p>Prior research has been reading through the APIs for <code>StreamReader</code> and <code>StreamWriter</code>, and looking through other StackOverflow questions, however most questions seem focused on just appending to the end of the file, or in different languages! </p>
  
  <p>As always thank you for your time, and if there is anything I've left off please let me know! </p>