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using System;
using System.Drawing;
using System.Windows.Forms;
 
namespace AnimationTest3a
{
	public class Form1 : Form
	{
        Timer timer1;
        PictureBox pictureBox1;//PictureBox 
        Panel panel1;//Panel
		Bitmap canvas;
		int x = 0;
		int y = 20;
		const int radius = 50;
		Brush bg_brush = new SolidBrush(SystemColors.Control);
		Brush fg_brush = new SolidBrush(Color.Black);
        System.ComponentModel.IContainer components = null;
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null)) components.Dispose();
            base.Dispose(disposing);
        }
		public Form1()
		{
            this.components = new System.ComponentModel.Container();
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            timer1 = new Timer();
            timer1.Interval = 20;
            timer1.Tick += timer1_Tick;
            pictureBox1 = new PictureBox();//PictureBox 
            panel1 = new Panel();//Panel
            this.Controls.Add(pictureBox1); this.Controls.Add(panel1);
            this.ClientSize = new Size(600, 400);
            pictureBox1.Size = new Size(600, 200);
            pictureBox1.BorderStyle = BorderStyle.FixedSingle;
            panel1.Size = new Size(600, 200);
            panel1.Location = new Point(0, 200);
			canvas = new Bitmap(600, 200);
            timer1.Start();
        }
		private void timer1_Tick(object sender, EventArgs e)
		{
            timer1.Enabled = false;
			Graphics g = Graphics.FromImage(canvas);
            int x2 = x + 2;
			g.FillRectangle(fg_brush, x2, y, radius, radius);
            g.FillRectangle(bg_brush, x, y, x2 - x, radius);
            x = x2;
			g.Dispose();
            pictureBox1.Image = new Bitmap(canvas);//PictureBox
            panel1.BackgroundImage = new Bitmap(canvas);
            if (x > 550)
            {
                x = 0; x2 = 0;
                canvas = new Bitmap(600, 200);
            }
            timer1.Enabled = true;
		}
	}
    static class Program
    {
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
}

prog.cs(3,22): error CS0234: The type or namespace name `Forms' does not exist in the namespace `System.Windows'. Are you missing `System.Windows.Forms' assembly reference?
prog.cs(7,23): error CS0246: The type or namespace name `Form' could not be found. Are you missing an assembly reference?
prog.cs(9,9): error CS0246: The type or namespace name `Timer' could not be found. Are you missing `System.Threading' or `System.Timers' using directive?
prog.cs(10,9): error CS0246: The type or namespace name `PictureBox' could not be found. Are you missing an assembly reference?
prog.cs(11,9): error CS0246: The type or namespace name `Panel' could not be found. Are you missing an assembly reference?
prog.cs(19,33): error CS0115: `AnimationTest3a.Form1.Dispose(bool)' is marked as an override but no suitable method found to override
Compilation failed: 6 error(s), 0 warnings

Standard output is empty