# Matrix.Prepend Method

**.NET Framework 3.0**

**Matrix**structure onto this

**Matrix**structure.

**Namespace:** System.Windows.Media**Assembly:** WindowsBase (in windowsbase.dll)

This operation is the same as multiplying the parameter matrix by this **Matrix** structure. Matrix multiplication is not commutative, however, so this operation is not the same as multiplying this **Matrix** structure by the parameter matrix; that is, matrix * this is not the same as this * matrix.

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 **Matrix** onto another **Matrix**.

private Matrix prependExample() { Matrix matrix1 = new Matrix(5, 10, 15, 20, 25, 30); Matrix matrix2 = new Matrix(2, 4, 6, 8, 10, 12); matrix1.Prepend(matrix2); // matrix1 is equal to (70,100,150,220,255,370). return matrix1; }

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, 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.