UIElement.Projection only in Silverlight and not in WPF?

I downloaded a sample code from here: http://gallery.expression.microsoft.com/ShowHideWithFlip

Now my problem is that i'm using WPF and the guy is using Silverlight..

I thought they are both using .NET 4 but i found out there is ".NET 4" and there is ".NET for Silverlight" totla diffrent things..

i get this error:

'System.Windows.UIElement' does not contain a definition for 'Projection' and no   extension method 'Projection' accepting a first argument of type 'System.Wind开发者_JAVA技巧ows.UIElement' could be found (are you missing a using directive or an assembly reference?)

I just found out why, the guy is using .NET for Silverlight and i'm using .NET 4.

Silverlight: http://msdn.microsoft.com/en-us/library/system.windows.uielement(v=VS.95).aspx

.NET 4: http://msdn.microsoft.com/en-us/library/system.windows.uielement.aspx

There is a solution for this?

I thought WPF and Silverlight is kinde of the same ( http://msdn.microsoft.com/en-us/library/ff921107(v=pandp.20).aspx )

I just found this: http://social.msdn.microsoft.com/Forums/en/wpf/thread/9acb712a-b592-49e7-83a1-e3ee7ff03014

This is my problam but i cant figure how to use the ViewPort3D. here is the part of the code:

        if (showElement.Projection == null)
        {
            showElement.Projection = new PlaneProjection();
            showElement.RenderTransformOrigin = new Point(.5, .5);
        }

        if (hideElement.Projection == null)
        {
            hideElement.Projection = new PlaneProjection();
            hideElement.RenderTransformOrigin = new Point(.5, .5);
        }

        mainStoryboard = new Storyboard();

        BackEase hide_ease = new BackEase() { EasingMode = EasingMode.EaseOut, Amplitude = 0.2 };

        // Show           
        PlaneProjection showPP = new PlaneProjection();
        CompositeTransform showCT = new CompositeTransform();

Unfortunately this doesn't exist in WPF 3.5 or 4, no. Only in Silverlight. However, you can certainly roll your own 3-D in WPF. Here's one example of 3-D rotated controls. Here's Microsoft's doc on Viewport3D.