WPF中的平移变换和旋转

翻译很好，但没有旋转，你能帮我吗？

TranslateTransform trans = new TranslateTransform();
Pointer.RenderTransform = trans;
DoubleAnimation animX = new DoubleAnimation(fromX, toX, TimeSpan.FromMilliseconds(325));
DoubleAnimation animY = new DoubleAnimation(fromY, toY, TimeSpan.FromMilliseconds(325));
DoubleAnimation rotateBy = new DoubleAnimation(0, 90, TimeSpan.FromMilliseconds(325));
animX.EasingFunction = new SineEase { EasingMode = EasingMode.EaseInOut };
animY.EasingFunction = new SineEase { EasingMode = EasingMode.EaseInOut };
animX.Completed += new EventHandler(myanim_Completed);
trans.BeginAnimation(TranslateTransform.XProperty, animX);
trans.BeginAnimation(TranslateTransform.YProperty, animY);
trans.BeginAnimation(RotateTransform.AngleProperty, rotateBy);

var group = new TransformGroup();
var trans = new TranslateTransform();
group.Children.Add(trans);
var rotate = new RotateTransform();
group.Children.Add(rotate);
Pointer.RenderTransform = group;
// the rest of the code is fine; only the last line needs fixing:
rotate.BeginAnimation(RotateTransform.AngleProperty, rotateBy);