I am working with timer class in C# when I call timer.elapsed its show expection

i am working with Timer class in c# when i call timer.Elapsed its show expection

"Cross-thread operation not valid: Control 'dataGridView1' accessed from a thread other than the thread it was created on."

System.Timers.Timer timer = new System.Timers.Timer();
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            timer.Interval = 5000;
            timer.Elapsed += Timer_Elapsed;
            timer.AutoReset = true;
            timer.Enabled = true;
        }

        private void Timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            GetAll();
        }

        private void GetAll()
        {
            using (var db=new POSEntities())
            {
                dataGridView1.DataSource= db.Products.ToList();
            }
        }