get system boot time in minutes in csharp

main.cs
using System;
using System.Runtime.InteropServices;

public class SystemUptime
{
    [DllImport("kernel32")]
    private static extern bool GetSystemTimes(out long idleTime, out long kernelTime, out long userTime);

    public static void Main(string[] args)
    {
        long idleTime, kernelTime, userTime;
        if (GetSystemTimes(out idleTime, out kernelTime, out userTime))
        {
            long tickCount = Environment.TickCount;
            long uptime = (tickCount * 10000) + idleTime + kernelTime + userTime;
            long uptimeMinutes = uptime / (60 * 10000000);
            Console.WriteLine("System uptime: " + uptimeMinutes + " minutes");
        }
    }
}
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