title: Replacing date in datetime with another date
body: <pre><code>    string t3 = "01:30 AM";
      txtStartDate.text = "12-Mar-2013";
      DateTime dat1 = DateTime.Parse(txtStartDate.Text);
      DateTime dat2 = (DateTime.ParseExact(t3, "H:mm tt", CultureInfo.InvariantCulture));
      //this gives 5/30/2013 1:30:00 AM 
      // 5/30/2013 is current date
  </code></pre>
  
  <p>I want to replace current date with dat1 value
  that is, I want dat2 to have 12/mar/2013 1:30:00:AM</p>
  
  <p>can anyone help me doing this?
  thanks in advance</p>