Scrolling Text Marquee Control

void MarqueeUpdate(object sender, EventArgs e)

    {

        CurrentText = CurrentText.Substring(1) + CurrentText[0];

        Invalidate();

    }

infinite loop is occurring and i have created this usercontrol but i am not able to import it on the form 

Sir i have written this code--

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;

namespace Marquee
{
    public partial class ScrollingTextControl : UserControl
    {
        

        Timer MarqueeTimer = new Timer();
        String CurrentText = "Hello";
       
        String OurText;

        public ScrollingTextControl()
        {
            InitializeComponent();
            MarqueeTimer.Interval = 150;
            MarqueeTimer.Enabled = true;
            MarqueeTimer.Tick += new EventHandler(MarqueeUpdate);
        }

        public int Interval
        {
            get { return MarqueeTimer.Interval; }
            set { MarqueeTimer.Interval = value; }
        }

        public override String Text
        {
            get { return OurText; }
            set { OurText = value; CurrentText = OurText; }
        }

        private void ScrollingTextControl_Paint(object sender, PaintEventArgs e)
        {
            TextRenderer.DrawText(e.Graphics, CurrentText, Font, ClientRectangle,
                SystemColors.ControlText);
        }

        void MarqueeUpdate(object sender, EventArgs e)
        {
            CurrentText = CurrentText.Substring(1) + CurrentText[0];
            Invalidate();
        }
        private void ScrollingTextControl_Load(object sender, EventArgs e)
        {

        }
    }
}


and

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace Marquee
{
    public partial class Form1 : Form
    {

        public Form1()
        {
            InitializeComponent();
            
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            
        }

        private void button1_Click(object sender, EventArgs e)
        {
            ScrollingTextControl scr = new ScrollingTextControl();
            scr.Text = "Hello";
            scr.ForeColor = Color.Black;
            this.Controls.Add(scr);
        }

    }
}

but some problem is occurring.