title: how to combine date and time in c#
body: <p>I have 2 values:</p>
  
  <pre><code>var dt1 = dtFromDate.Value;
  var tm1 = tmFromTime.Value;
  
  
  dt1 = 12/5/2013 12:00:00 AM
  
  tm1 = 11/5/2013 9:00:00 AM
  </code></pre>
  
  <p>i want to make datetime as  : 12/5/2013 9:00:00 AM</p>
  
  <p>how can it be possible?</p>