title: using Stream writer to Write a specific bytes to textfile
body: <p>Well I'm trying to write some values and strings to a text file.<br>
  but this text file must contain 2 bytes</p>
  
  <p>These are the 2 bytes I want to insert to my text file after finishing writing the other values to it:</p>
  
  <p><img src="https://i.stack.imgur.com/LBJ9G.png" alt="hex"></p>
  
  <p>I tried this method but I have no idea how to write bytes through it</p>
  
  <pre><code>using (StreamWriter sw = new StreamWriter(outputFilePath, false, Encoding.UTF8))
  </code></pre>
  
  <p>I have no idea about how to write them to the text file after putting the strings I want on it.</p>