Graphics.DrawEllipse Method (Pen, RectangleF)

Draws an ellipse defined by a bounding RectangleF.

Namespace: System.Drawing
Assembly: System.Drawing (in system.drawing.dll)

public void DrawEllipse (
	Pen pen,
	RectangleF rect
public void DrawEllipse (
	Pen pen, 
	RectangleF rect
public function DrawEllipse (
	pen : Pen, 
	rect : RectangleF
Not applicable.



Pen that determines the color, width, and style of the ellipse.


RectangleF structure that defines the boundaries of the ellipse.

Exception typeCondition


pen is a null reference (Nothing in Visual Basic).

This method draws an ellipse that is defined by the bounding rectangle specified by the rect parameter.

The following code example is designed for use with Windows Forms, and it requires PaintEventArgse, which is a parameter of the Paint event handler. The code performs the following actions:

  • Creates a black pen.

  • Creates a rectangle to bound an ellipse.

  • Draws the ellipse to the screen.

private void DrawEllipseRectangleF(PaintEventArgs e)
    // Create pen.
    Pen blackPen = new Pen(Color.Black, 3);
    // Create rectangle for ellipse.
    RectangleF rect = new RectangleF(0.0F, 0.0F, 200.0F, 100.0F);
    // Draw ellipse to screen.
    e.Graphics.DrawEllipse(blackPen, rect);

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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