title: subtract two datetime
body: <p>I use these following codes in the winform for subtracting two datetime. these are complete datetime which includes day and month and year in it. I want to know how can I subtract two date time only with day and month. For example subtract of 5/12 and 6/12 without any year in it.</p>
  
  <pre><code>        DateTime date1 = new DateTime(byear, bmonth, bday, 0, 0, 0);
      DateTime datenow =  DateTime.Now;
  TimeSpan timeSpan = datenow - date1;
  </code></pre>
  
  <p>Please give me some codes so that I can subtract two datetime with its day and month.</p>
  
  <p>Thanks in advance </p>