Is it possible to determine how long a process has been running

Question

Is it possible, in C#, to get a list of running processes (not service processes, but actual applications) and get a DateTime of when the application started? Or a TimeSpan or even an integer of how long a process has been running?

Answer 1

Process.GetProcesses will retrieve a list of running processes.

Each Process has a StartTime property that

Gets the time that the associated process was started.

Simply subtract that from DateTime.Now to get how long the process has been running.

static void Main(string[] args)
{
    var procs = Process.GetProcesses();
    foreach (var proc in procs) {
        TimeSpan runtime;
        try {
            runtime = DateTime.Now - proc.StartTime;
        }
        catch (Win32Exception ex) {
            // Ignore processes that give "access denied" error.
            if (ex.NativeErrorCode == 5)
                continue;   
            throw;
        }

        Console.WriteLine("{0}  {1}", proc, runtime);
    }

    Console.ReadLine();
}