jetherald/JetHerald/Commands/CommandHelper.cs

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

namespace JetHerald.Commands
{
    public static class CommandHelper
    {
        public static async Task<bool> CheckAdministrator(TelegramBotClient bot, Message msg)
        {
            if (msg.Chat.Type != ChatType.Private)
            {
                var chatMember = await bot.GetChatMemberAsync(msg.Chat.Id, msg.From.Id);
                return chatMember.Status is ChatMemberStatus.Administrator or ChatMemberStatus.Creator;
            }
            return true;
        }
    }
}