اشکال در حل مشکل Cross-thread operation not valid

[mranderson]

با سلام به اساتید ارجمند وقتی برنامه رو run میکنم با ارور An unhandled exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll
Additional information: Cross-thread operation not valid: Control 'label1' accessed from a thread other than the thread it was created on. مواجه میشم.
مشکل قطعه کد زیر چیه؟ با سپاس

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  public partial class Form1 : Form

    {

        Telegram.Bot.Api bot = new Telegram.Bot.Api("337051512:AAGl5b088W1q-_9Z8_y2ZtF8tQ6UIeoszvg");

        Thread a;





        public Form1()





        {

            InitializeComponent();

        }





        public void Getupdates()

        {





            int offset = 0;

            while (true)

            {





                Telegram.Bot.Types.Update[] updates = bot.GetUpdates(offset).Result;









                foreach(var update in updates)

                {

                    offset = update.Id + 1;

                    if (update.Message == null)

                        continue;

                    var from = update.Message.From;

                    var text = update.Message.Text;

                    long ChatId = update.Message.Chat.Id;









                    label1.Text = string.Format("sender : (0)\nText : (1)\nChatid): (2)",from,text,ChatId);









                }





            }









        }

        private void Form1_Load(object sender, EventArgs e)

        {

            a = new Thread(new ThreadStart(Getupdates));

            a.Start();









}