Drawing to the screen

This program just doesn't run fast. I have to minimize and then to maximize it in order to drow the ellipse. Here my partial class without index highliting:

 

 

public partial class Form1 : Form
{   

public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
this.pictureBox1.Paint += new System.Windows.Forms.PaintEventHandler(this.FillEllipseRectangle);
}

private void FillEllipseRectangle(object sender, PaintEventArgs e)
{

MessageBox.Show("very well done!");
Pen itsme = new Pen(Color.Green, 3);
//Draw the ellipse
int x = 5;
int y = 5;
int width = 200;
int height = 100;
rect = new Rectangle(x, y, width, height);
e.Graphics.DrawEllipse(itsme, rect);
//Draw the ellipse
int x1= 5;
int y1 = 5;
int width1 = 200;
int height1 = 100;
rect1 = new Rectangle(x1, y1, width1, height1);
SolidBrush redBrush = new SolidBrush(Color.Red);
e.Graphics.FillEllipse(redBrush, this.rect1);

}
public System.Drawing.Rectangle rect { get; set; }
public System.Drawing.Rectangle rect1 { get; set; }
}
} 

I have done it this way:

 But the program doesn't run fast. I have to minimize and then to maximize it in order to drow the ellipse. I want this program to run fast. Hope you can help me.