How can a thread update a textbox in the page form that is part of the main thread?

I'm creating a UWP APP to receive the data from ADC board, I was used WindForm to develop it, it can work, but because UWP doesn't support using Control.Invoke look through the papers, but I still have no idea how can I start, how can I convert the windform code to UWP code?

The windform code as below

 public async Task StartProcess()

        {
            IsCancelled = false;
            Task t = new Task(() =>
            {
                while (IsCancelled == false)
                {
                    I = I + 1;
                    SetTextBox(I);

                }
            });
            t.Start();
        }

     public void SetTextBox(int _Val)
    {
        if (InvokeRequired)
        {
            this.Invoke((MethodInvoker)delegate () { SetTextBox(_Val); });
            return;
        }
        textBox1.Text = Convert.ToString(_Val);
    }