Draw ellipse with specify x,y,width, height

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I am trying to draw an ellipse with specify x,y,width, and height for
input argument in C# .net (Visual Studio 2005).

It seem it will not draw for me. What am I missing?

See the code below, thanks.


//CODE

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

namespace test
{
public partial class Form1 : Form
{
public Form1()
{

InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
draw(10, 20, 20, 50);
draw(50, 80, 50, 150);
}

private void draw(int x1, int y1, int w, int h)
{
Graphics g = this.CreateGraphics();
g.FillEllipse(Brushes.Blue, x1, y1, w, h);
}

}
}
.

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