title: What means an InvalidOperationException on Process.ExitTime "Process was not started by this object, so requested information cannot be determined."
body: <p>We have a tool that manages several processes of a computer and from time to time in uncertain conditions we get an <code>InvalidOperationException</code>when accessing the MSDN: <a href="https://msdn.microsoft.com/es-es/library/system.diagnostics.process.exittime(v=vs.110).aspx" rel="noreferrer">Process.ExitTime</a> property.</p>
  
  <p>The exception message says </p>
  
  <blockquote>
    <p>process was not started by this object, so requested information
    cannot be determined</p>
  </blockquote>
  
  <p>Does that mean that I can only get the exit time of a process that I've started myself? That's not documented anywhere.</p>