get system boot time in csharp

main.cs
using System;
using System.Diagnostics;
using System.Management;

namespace BootTimeExample
{
    class Program
    {
        static void Main(string[] args)
        {
            ManagementObjectSearcher mos = new ManagementObjectSearcher("SELECT LastBootUpTime FROM Win32_OperatingSystem WHERE Primary='true'");
            ManagementObjectCollection moc = mos.Get();
            DateTime lastBootUpTime = DateTime.MinValue;
            foreach (ManagementObject mo in moc)
            {
                lastBootUpTime = ManagementDateTimeConverter.ToDateTime(mo.Properties["LastBootUpTime"].Value.ToString());
                break;
            }
            Console.WriteLine("System boot time: " + lastBootUpTime);
        }
    }
}
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