Positions child elements and determines a size for a System.Windows.UIElement. Parent elements call this method from their System.Windows.UIElement.ArrangeCore(System.Windows.Rect) implementation (or a WPF framework-level equivalent) to form a recursive layout update. This method constitutes the second pass of a layout update.

'Declaration
 
Public Sub Arrange( _
   ByVal finalRect As Rect _
) 

public void Arrange( 
   Rect finalRect
)