DispatcherTimer doesn't seem to work with milliseconds.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Threading;

namespace WpfApplication1
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        int seconds = 0;
        int tickCounter=0;

        public MainWindow()
        {
            InitializeComponent();


        }

        void timer1_Tick(object sender, EventArgs e)
        {
            tickCounter ++;

            if (tickCounter == 1000)
            {
                tickCounter = 0;
                seconds++;
                label1.Content = seconds.ToString();
            }
        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            DispatcherTimer timer1 = new DispatcherTimer();
            timer1.Interval = TimeSpan.FromMilliseconds(1);
            timer1.Tick += timer1_Tick;
            timer1.Start();
        }
    }
}

I dont know why this doesn't work a second has 1000 milliseconds in it and if this timer worked it should
increase the seconds variable every 100 milliseconds but it doesn't it takes so long I stop waiting if I switch the
Interval to TimeSpan.FromSeconds(1) it works fine I've used practically the same code in WinForms and it works fine.