using System;

​

public class DemoTimeProvider() : TimeProvider

{

    public override TimeZoneInfo LocalTimeZone { get; } = TimeZoneInfo.FindSystemTimeZoneById("Australia/Melbourne");

    public override DateTimeOffset GetUtcNow() => DateTimeOffset.FromUnixTimeSeconds(1734711552);

}

​

public class DateTimeWithTimeZone

{

    private readonly TimeProvider timeProvider;

    private readonly DateTimeOffset localDateTimeWithOffset;

​

    public DateTimeWithTimeZone(TimeProvider timeProvider)

    {

        this.timeProvider = timeProvider;

        this.localDateTimeWithOffset = timeProvider.GetLocalNow();

    }

​

    public DateOnly GetLocalDay()

    {

        return DateOnly.FromDateTime(this.localDateTimeWithOffset.DateTime);

    }

​

​

}

public class Program

{

    public static void Main()

    {

        DemoTimeProvider demoTimeProvider = new();

        Console.WriteLine($"fake date in UTC is {demoTimeProvider.GetUtcNow()}");

        DateTimeWithTimeZone trialTime = new(demoTimeProvider);

        Console.WriteLine($"meaning fake day in Melbourne is {trialTime.GetLocalDay()}");

    }

}