Invoke or BeginInvoke cannot be called on a control

hello look the bellow code may help you

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Threading;
namespace webresponse
{
public partial class Form3 : Form
{
public delegate void UpdateLabel(string label);
public bool IsCancelled { get; set; }
public Form3()
{
InitializeComponent();
}
private void UpdateUI(string labelText) {
lblStopWatch.Text = labelText;
}
private void btnStart_Click(object sender, EventArgs e)
{
DateTime startTime = DateTime.Now; IsCancelled = false;
Thread t = new Thread(() =>
{
while (IsCancelled==false)
{
Thread.Sleep(1000);
string timeElapsedInstring = (DateTime.Now - startTime).ToString(@"hh\:mm\:ss");
lblStopWatch.Invoke(new UpdateLabel(UpdateUI), timeElapsedInstring);
}
}); t.Start();
}
private void btnStop_Click(object sender, EventArgs e)
{
IsCancelled = true;
}
}

In the threading call the deligate function

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