# Matrix.ScalePrepend Method

**Visual Studio 2010**

Prepends the specified scale vector to this Matrix structure.

**Namespace:**System.Windows.Media

**Assembly:**WindowsBase (in WindowsBase.dll)

#### Parameters

- scaleX
- Type: System.Double

The value by which to scale this Matrix structure along the x-axis.

- scaleY
- Type: System.Double

The value by which to scale this Matrix structure along the y-axis.

In a composite transformation, the order of individual transformations is important. For example, if you first rotate, then scale, then translate, you get a different result than if you first translate, then rotate, then scale. One reason order is significant is that transformations like rotation and scaling are done with respect to the origin of the coordinate system. Scaling an object that is centered at the origin produces a different result than scaling an object that has been moved away from the origin. Similarly, rotating an object that is centered at the origin produces a different result than rotating an object that has been moved away from the origin.

The following example shows how to prepend a scale to a Matrix structure.

private Matrix scalePrependExample() { Matrix myMatrix = new Matrix(5, 10, 15, 20, 25, 30); // Prepend a scale ab with a horizontal factor of 2 // and a vertical factor of 4 about the origin. // After this operation, // myMatrix is equal to (10, 20, 60, 80, 25, 30) myMatrix.ScalePrepend(2, 4); return myMatrix; } private Matrix scalePrependAboutPointExample() { Matrix myMatrix = new Matrix(5, 10, 15, 20, 25, 30); // Prepend a scale with a horizontal factor of 2 // and a vertical factor of 4 about the // point (100,100). // After this operation, // myMatrix is equal to (10, 20, 60, 80, -4975, -6970) myMatrix.ScaleAtPrepend(2, 4, 100, 100); return myMatrix; }

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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