title: What is DateTime.ToBinary vs. Ticks and FromBinary vs. constructor
body: <p>I noticed that <code>DateTime</code> has <code>ToBinary</code> and <code>Ticks</code>, which seem to return the same values. Furthermore <code>FromBinary</code> and the constructor that takes a long value both seem to result in the same object. </p>
  
  <p>Why do both exist? Are there differences on other platforms or gotchas I should be aware of?</p>