کدهای اختلاف دو زمان - date_diff_01 - 14001213

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 date_diff_01
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {


            System.DateTime firstDate = new System.DateTime(2000, 01, 01);

            System.DateTime secondDate = new System.DateTime(2000, 05, 31);

            System.TimeSpan diff = secondDate.Subtract(firstDate);

            System.TimeSpan diff1 = secondDate - firstDate;

            String diff2 = (secondDate - firstDate).TotalDays.ToString();

            MessageBox.Show(diff1.ToString());

            ///

            System.DateTime[] abc_DateTime = new DateTime[10];

            int year, month, day, hour, minute, second, millisecond;

            year = 2022;

            month = 2;

            day = 28;

            hour = 14;

            minute = 16;

            second = 23;

            millisecond = 123;

            System.Globalization.Calendar calendar;

            System.DateTimeKind kind = DateTimeKind.Local;
            
            abc_DateTime[0] = new DateTime(year, month, day, hour, minute, second, millisecond, calendar, kind);



        }

    }

}