WPF左右移动动画实现

//boxItem要移动的控件 
　　　　　　　　　　　　　　DoubleAnimation doubleAnimation = newDoubleAnimation();
                        doubleAnimation.Duration = newDuration
                            (TimeSpan.FromSeconds(5));

                        TranslateTransform transform = newTranslateTransform();
                        boxItem.RenderTransform =transform;
                        transform.X = 0;
                    
                                doubleAnimation.To = 100;
                 
                            transform.BeginAnimation(TranslateTransform.XProperty, doubleAnimation);
                        }