GetComputerUpTime.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace computer_get_up_time
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        public string getuptime()

        {

            String gg = String.Empty;

            gg += Convert.ToString(Environment.TickCount / 86400000) + " Day(s), ";

            gg += Convert.ToString(Environment.TickCount / 3600000 % 24) + " hh, ";

            gg += Convert.ToString(Environment.TickCount / 120000 % 60) + " min, ";

            gg += Convert.ToString(Environment.TickCount / 1000 % 60) + " ss.";

            return gg;

        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            label1.Text = getuptime();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }
}