title: Redirection of standard and error output appending to the same log file
body: <p>I need to collect the standard output and error log from several processes into one single log file.</p>
  
  <p>So every output must <strong>append</strong> to this log file.</p>
  
  <p>I want to call all the jobs with lines like this:</p>
  
  <pre><code>$p=start-process myjob.bat -redirectstandardoutput $logfile -redirecterroroutput $logfile -wait
  </code></pre>
  
  <p>Where do I have to put the information to append?</p>