c# - How to know when was Windows started or shutdown?

Question

I need to develop a program in C# find out when was Windows started or shutdown.

Is there a log file that I can read to know Windows start and shutdown times? Or do you have any ideas how to do so?

EDIT :

With the help of Mr. Reed Copsey, the best answer is found under this question.

Answer 1

According to this article you can use WMI to get the last boot date/time.

// define a select query
SelectQuery query =
    new SelectQuery(@"SELECT LastBootUpTime FROM Win32_OperatingSystem
       WHERE Primary='true'");

// create a new management object searcher and pass it
// the select query
ManagementObjectSearcher searcher =
    new ManagementObjectSearcher(query);

// get the datetime value and set the local boot
// time variable to contain that value
foreach(ManagementObject mo in searcher.Get())
{
    dtBootTime =
        ManagementDateTimeConverter.ToDateTime(
            mo.Properties["LastBootUpTime"].Value.ToString());

    // display the start time and date
    txtDate.Text = dtBootTime.ToLongDateString();
    txtTime.Text = dtBootTime.ToLongTimeString();
}