<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:sys="clr-namespace:System;assembly=mscorlib" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" > <Grid> <Rectangle Height ="100" Width ="40" Fill ="Red" Grid.Row="0" Grid.Column="0"> <Rectangle.LayoutTransform> <RotateTransform Angle ="45"/> </Rectangle.LayoutTransform> </Rectangle> </Grid> </Window>