<StackPanel Margin="35" Background="Gray">
<StackPanel.Projection>
<PlaneProjection RotationX="-35" RotationY="-35" RotationZ="15"/>
</StackPanel.Projection>
<TextBlock Margin="10">Type Something Below</TextBlock>
<TextBox Margin="10"></TextBox>
<Button Margin="10" Content="Click" Width="100"/>
</StackPanel>