using System;

using System.Globalization;

using System.Collections.Generic;

​

public struct MyStruct

{

    public int MyInt;

    public int[] MyInts;

}

​

    public sealed record BuildingEventStatusRecord

    {

        public string Location;

        public string Building;

        public string Title;

        public int ExpectedVisitors;

        public DateTime StartTime;

        public DateTime EndTime;

        public double Latitude;

        public double Longitude;

    }

​

public static class StringUtil

{

    public static string ClampWithEllipsis(string str, int limit)

    {

        if (str.Length <= limit)

        {

            return str;

        }

​

        Span<char> span = stackalloc char[limit - 1 + 3];

        str.AsSpan(0, limit - 1).CopyTo(span);

        "...".AsSpan().CopyTo(span.Slice(limit - 1));

        return new string(span);

    }

}

​

public class Program

{

    public static void Main()

    {

        var r = new BuildingEventStatusRecord()

        {

            Location = "Location1",

            Building = "B1",

            Title = "T1",

            ExpectedVisitors = 12,

            StartTime = new DateTime(2022, 12, 14, 9, 0, 0),

            EndTime = new DateTime(2022, 12, 14, 10, 0, 0),

            Latitude = 1.34,

            Longitude = 2.56,

        };

        Console.WriteLine(r);

        //Console.WriteLine(DateTime.Parse("2022-06-20T15:02:45.121Z", CultureInfo.InvariantCulture, DateTimeStyles.RoundtripKind).Kind);

        var dt = DateTime.ParseExact(

            "2022-06-21T05:58:00.000Z",

            "yyyy-MM-ddTHH:mm:ss.fffZ",

            CultureInfo.InvariantCulture,

            DateTimeStyles.AssumeUniversal | DateTimeStyles.AdjustToUniversal);

        Console.WriteLine(dt);

        return;

        Console.WriteLine(StringUtil.ClampWithEllipsis("abcd", 3));

        Console.WriteLine(StringUtil.ClampWithEllipsis("abc", 3));

        return;

        var map = new Dictionary<int, MyStruct>();

        map[0] = new MyStruct() { MyInts = new int[] { 2 } };

        if (map.TryGetValue(0, out var value))

        {

            value.MyInt += 1;

            value.MyInts[0] += 1;

            Console.WriteLine("Hello");

        }

        Console.WriteLine(map[0].MyInts[0]);

        var arr = new MyStruct[1];

        var s = arr[0];

        arr[0].MyInt += 1;

        Console.WriteLine(arr[0].MyInt);

    }

}