Simple Telegram polls bot using long-polling (wiki) in C#

TgPollsBot.cs

using System;
using System.Threading.Tasks;
using Telegram.Bot;
using Telegram.Bot.Args;
using Telegram.Bot.Types;
using Telegram.Bot.Types.Enums;

namespace ConsoleTgBot
{
    static class Program
    {
        static TelegramBotClient Bot = new TelegramBotClient("<bot_token>");

        static ChatId PollChatID = null;
        static int PollMessageID = 0;
        static bool PollStarted = false;

        public const string PollQuestion = "Which Telegram client[s] do you use?";
        public static readonly string[] PollAnswers =
        {
            "Telegram desktop",
            "Unigram",
            "Telegram Android",
            "Telegram X",
            "Telegram iOS",
            "Telegram macOS",
            "Telegram web",
            "Telegram Web K (beta)",
            "Telegram Web Z (beta)",
            "Other client"
        };
        public const bool IsAnonymous = false;

        public const PollType BotPollType = PollType.Regular;
        public const bool IsMultiple = true;
        public static readonly DateTime? CloseDate = null;

        public const int QuizTime = 60; // 1m
        public const int CorrectOptionId = 0; // Same as null
        public const string Explaination = "Unknown";

        public static Poll LastPollData = null;

        static async Task Main(string[] args)
        {
            Bot.OnUpdate += Bot_OnUpdate;
            Bot.StartReceiving();
            Console.WriteLine("Bot start receiving..");

            // Test bot
            User me = await Bot.GetMeAsync();
            Console.WriteLine($"@{me.Username} start working..");

        ReadCommand:
            Console.Write("Enter a command: ");
            ProcessCommand(Console.ReadLine());
            goto ReadCommand;

        EndBot:
            Bot.StopReceiving();
            Console.WriteLine("Bot end working");
        }

        private static async void ProcessCommand(string commandLine)
        {
            string[] args = commandLine.Split(' ');
            string commandName = args[0];
            switch (commandName)
            {
                case "send-poll":
                    if (PollStarted)
                    {
                        Console.Error.WriteLine("Stop current poll to start another poll!");
                        break;
                    }
                    Chat chat = null;
                    try
                    {
                        chat = await Bot.GetChatAsync(args[1]);
                    }
                    catch (Exception)
                    {
                        Console.Error.WriteLine($"Enter a vaild chat ID!\n {args[1]} isn\'t vaild");
                        break;
                    }

                    Message pollMsg = await Bot.SendPollAsync(chat, PollQuestion, PollAnswers, false, 0, null, default, IsAnonymous, BotPollType, IsMultiple, CorrectOptionId, false, Explaination, ParseMode.Html, QuizTime, CloseDate);

                    // Set variables
                    PollMessageID = pollMsg.MessageId;
                    PollChatID = pollMsg.Chat.Id;
                    LastPollData = pollMsg.Poll;

                    PollStarted = true;
                    break;

                case "stop-poll":
                    if (PollStarted == false)
                    {
                        Console.ForegroundColor = ConsoleColor.Red;
                        Console.Error.WriteLine("Start poll first to stop it!");
                        Console.ResetColor();
                        break;
                    }
                    Poll result = await Bot.StopPollAsync(PollChatID, PollMessageID);
                    Console.WriteLine($"Total voters count: {result.TotalVoterCount}");
                    for (int i = 0; i < result.Options.Length; i++)
                    {
                        Console.WriteLine($"{result.Options[i].Text}: {result.Options[i].VoterCount}");
                    }
                    PollStarted = false;
                    break;                    
            }
        }

        private static void Bot_OnUpdate(object sender, UpdateEventArgs e)
        {
            if (e.Update.Poll != null)
            {
                Console.WriteLine();
                if (e.Update.Poll.IsClosed)
                {
                    Console.WriteLine("Poll closed");
                    PollStarted = false;
                }
                else
                {
                    Console.WriteLine($"New anonymous answer received!");
                }
            }
            else if (e.Update.PollAnswer != null)
            {
                Console.WriteLine();
                Console.ForegroundColor = ConsoleColor.Green;
                Console.WriteLine("New answer received!");
                Console.ForegroundColor = ConsoleColor.Gray;
                Console.WriteLine($"{e.Update.PollAnswer.User.FirstName} ({e.Update.PollAnswer.User.Username}) voted:");
                for (int i = 0; i < e.Update.PollAnswer.OptionIds.Length; i++)
                {
                    Console.WriteLine($"    {PollAnswers[e.Update.PollAnswer.OptionIds[i]]}");
                }
            }
        }
    }
}