Animation: Rotate a string with a timer.

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

namespace StringRotation
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        
        string RotaStr = "123";         // The string to rotate
        float RotationAngle = 0f;       // The "amount" of rotation
        Point loc = new Point(50, 50);  // Where we first start to draw the string

        private void DrawIt(Graphics G)
        {
            const int cFontSize = 36;

            // Don't make the chars look edgy
                G.SmoothingMode = SmoothingMode.AntiAlias; 
            // Set up string stuff
                FontFamily family = new FontFamily("Arial");
                int fontStyle = (int)FontStyle.Bold;
                int emSize = family.GetEmHeight(FontStyle.Bold) / cFontSize;
                Point origin = loc;
                StringFormat format = StringFormat.GenericDefault;
                Size TxSz = TextRenderer.MeasureText(RotaStr, new Font(family, cFontSize));
            // Define rotation matrix
                Matrix RotationTransform = new Matrix(1, 0, 0, 1, 1, 1); 
            // Calculate rotation point
                PointF RotationPoint = new PointF(loc.X + TxSz.Width / 2, loc.Y + TxSz.Height / 2);          
            // Set up the path
                GraphicsPath gp = new GraphicsPath();                 
            // Add the string to the path.
                gp.AddString(RotaStr, family, fontStyle, emSize, origin, format);
            // Make the rotation transformation
                RotationTransform.RotateAt(RotationAngle, RotationPoint);
                gp.Transform(RotationTransform);
            // Color the path and fill it
                SolidBrush B = new SolidBrush(Color.OliveDrab);
                G.FillPath(B, gp);
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            RotationAngle += 20f; // Rotate by 20 degrees every tick
            if (RotationAngle == 360f) RotationAngle = 0f;
            Refresh();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            this.timer1.Interval = 200;
            timer1.Start();
        }

        private void panel1_Paint(object sender, PaintEventArgs e)
        {
            DrawIt(e.Graphics);
        }
    }
}