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Pen.RotateTransform Method (Single)

Rotates the local geometric transformation by the specified angle. This method prepends the rotation to the transformation.

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

public void RotateTransform(
	float angle


Type: System.Single

The angle of rotation.

Because the shape of a pen is circular, a rotation does not have any visible effect unless the pen is scaled in the x- or y-axis direction.

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

  • Creates a Pen.

  • Draws a rectangle using the pen.

  • Scales the pen by 2 times in the x-axis direction.

  • Rotates the pen 90 degrees clockwise.

  • Draws a second rectangle to demonstrate the difference.

public void RotateTransform_Example1(PaintEventArgs e)

    // Create a Pen object.
    Pen rotatePen = new Pen(Color.Black, 5);

    // Draw a rectangle with rotatePen.
    e.Graphics.DrawRectangle(rotatePen, 10, 10, 100, 100);

    // Scale rotatePen by 2X in the x-direction.
    rotatePen.ScaleTransform(2, 1);

    // Rotate rotatePen 90 degrees clockwise.

    // Draw a second rectangle with rotatePen.
    e.Graphics.DrawRectangle(rotatePen, 140, 10, 100, 100);

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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