title: StringBuilder export csv with quotation marks at the beginning
body: <p>I want to write several csv lines into a csv file with StringBuilder. I enclose every field with quoation marks. If I export the file as a .txt I have excactly what I want <strong>("Artist","Album","Track")</strong>.
  If I export as .csv the first field is not enclosed with quoation marks <strong>(Artist,"Album","Track")</strong>. Some test code that reproduces the issue:</p>
  
  <pre><code>static void Main(string[] args)
  {
    StringBuilder csv = new StringBuilder();
  
    string artist = EncloseComma("Artist");
    string album = EncloseComma("Album");
    string track = EncloseComma("Track");
  
    string newLine = string.Format("{0},{1},{2}", artist, album, track);
    csv.AppendLine(newLine);
    File.WriteAllText("test.csv", csv.ToString());
  }
  
  private static string EncloseComma(string str)
  {
    return "\"" + str + "\"";
  }
  </code></pre>