parr_api/PARR.BLL/Services/Implementations/IntervalService.cs

using Microsoft.Extensions.Logging;
using PARR.BLL.Services.Interfaces;

namespace PARR.BLL.Services.Implementations
{
    internal class IntervalService : IIntervalService
    {
        private readonly ILogger<IntervalService> logger;

        public IntervalService(ILogger<IntervalService> logger)
        {
            this.logger = logger;
        }

        public async Task IntervalInitAsync(IntervalHandlerDelegate intervalHandler, TimeSpan interval)
        {
            while (true)
            {
                logger.LogInformation($"Запуск по расписанию. Интервал: {interval}");

                await intervalHandler.Invoke();

                logger.LogInformation($"Следующая дата запуска: {DateTimeOffset.Now.Add(interval)}");

                await Task.Delay(interval);
            }
        }
    }
}