title: Make .txt file unreadable / uneditable
body: <p>I have a program which saves a little .txt file with a highscore in it:</p>
  
  <pre><code> // Create a file to write to. 
  string createHighscore = _higscore + Environment.NewLine;
  File.WriteAllText(path, createText);
  
  // Open the file to read from. 
  string createHighscore = File.ReadAllText(path);
  </code></pre>
  
  <p>The problem is that the user can edit the file as simple as possible – with a texteditor. So I want to make the file <em>unreadable / uneditable or encrypt it</em>. </p>
  
  <p>My thinking was that I could save the data in a resource file, but can I write in a resource file?
  Or save it as .dll, encrypt/decrypt it or look for a MD5-sum/hash.</p>