C# seconds since specific date

Question

In C# 3.0, how do I get the seconds since 1/1/2010?

Answer 1

Goes like this:

  TimeSpan test = DateTime.Now - new DateTime(2010, 01, 01);
  MessageBox.Show(test.TotalSeconds.ToString());

For one liner fun:

 MessageBox.Show((DateTime.Now - new DateTime(2010, 01, 01))
     .TotalSeconds.ToString());

Answer 2

You can substract 2 DateTime instances and get a TimeSpan:

DateTime date = new DateTime(2010,1,1);
TimeSpan diff = DateTime.Now - date;
double seconds = diff.TotalSeconds;