Issue while Retrieving DateTime from session and calculating TimeSpan in ASP.Net using c#.

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C#

ASP.NET

I am storing Datetime in a session as mentioned below:-

Session["LoggedInTime"] = System.DateTime.Now;

Then i m retrieving this value on a page load like this:-

DateTime _loggedInTime = Convert.ToDateTime(Session["LoggedInTime"]);

I debug the above code code and find that up to here the _loggedInTIme is showing the correct date which i m storing in it. After that i m calculating the time span like this:-

TimeSpan elapsedtimespan = System.DateTime.Now.Subtract(_loggedInTime);
int elapsedtime = Convert.ToInt32(elapsedtimespan.TotalSeconds);

I found while debugging the code that ,while subtraction the _loggedInTime = {1/1/0001 12:00:00 AM} and due to which i m not able to get exact elapsedtime .

Please help me to solve this issue as i m not getting why the _loggedInTime become {1/1/0001 12:00:00 AM} at calculating TimeSpan.