Question

I want my WPF application run just one time. I have no problem with this.
My problem is how can I determine if windows currently restarted?

Answer 1

You could check and store the system uptime along with the last runtime and compare that with the current uptime.

Retrieve system uptime using C#

Some psudeocode:

   DateTime computerLastStarted = Now - Uptime;
   if (computerLastStarted > storedComputerLastStarted + or - tollerance) {
      storedComputerLastStarted = computerLastStarted;
      StartProgram();
    }