static async void Bot_OnMessage(object sender, MessageEventArgs e)
        {
            var pasta = new CopyPasta {
                CharacterLimit = 4000
            };

            if (e.Message.Text != null && e.Message.Text.Length > 0)
            {
                Console.WriteLine($"Received a text message in chat {e.Message.Chat.Id}: {e.Message.Text}");

                var position = e.Message.Text.IndexOf('@');
                var command  = e.Message.Text.ToLower();

                if (command.Contains(' '))
                {
                    command = command.Substring(0, e.Message.Text.IndexOf(' ')).Trim().ToLower();
                }
                command = command.Substring(0, position == -1 ? e.Message.Text.Length : position);
                PostFilter postFilter;
                switch (command)
                {
                case "/top":
                    Console.WriteLine($"Sending Top Copypasta to {e.Message.Chat.Id}.");
                    postFilter = PostFilter.TOP;
                    break;

                case "/hot":
                    Console.WriteLine($"Sending Hot Copypasta to {e.Message.Chat.Id}.");
                    postFilter = PostFilter.HOT;
                    break;

                case "/new":
                    Console.WriteLine($"Sending New Copypasta to {e.Message.Chat.Id}.");
                    postFilter = PostFilter.NEW;
                    break;

                default:
                    Console.WriteLine($"Unknown command from {e.Message.Chat.Id}: {command}");
                    postFilter = PostFilter.INVALID;
                    break;
                }

                if (postFilter != PostFilter.INVALID)
                {
                    var post = pasta.GetRandomPasta(postFilter);
                    await botClient.SendTextMessageAsync(
                        chatId : e.Message.Chat,
                        text : post.Selftext,
                        replyMarkup : new InlineKeyboardMarkup(new[]
                    {
                        InlineKeyboardButton.WithUrl("Go to Post", post.Url.ToString())
                    })
                        );
                }
            }
        }
 public CopyPastaBot(string token)
 {
     this.token     = token;
     this.copyPasta = new CopyPasta();
 }