static async Task Main(string[] args)
        {
            var postsIds = new List <int>()
            {
                4, 5, 6, 7, 8, 9, 10, 11, 12, 13
            };
            var         uri         = "https://jsonplaceholder.typicode.com/posts/";
            var         fileName    = "result.txt";
            var         postHandler = new PostHandler();
            var         fileHadler  = new FileHandler();
            List <Post> posts       = new List <Post>();



            foreach (var postId in postsIds)
            {
                try
                {
                    var post = await postHandler.GetPostAsync(uri, postId);

                    posts.Add(post);
                }

                catch (HttpRequestException exception)
                {
                    Console.WriteLine($"Ошибка: {exception.Message}");
                    Console.WriteLine($"{exception.InnerException}");
                }
            }

            fileHadler.WriteToFileAndSave(fileName, posts);
            Console.ReadKey();
        }