public MatrixAnimation(Matrix fromValue, Matrix toValue, Duration duration, FillBehavior fillBehavior)
 {
     From = fromValue;
     To = toValue;
     Duration = duration;
     FillBehavior = fillBehavior;
 }

 public DoubleAnimation(double from, double to, Duration duration, FillBehavior fillBehavior)
 {
   this.From = from;
   this.To = to;
   this.Duration = duration;
   this.FillBehavior = fillBehavior;
 }

 public LinearGradientAnimation(LinearGradientBrush toValue, Duration duration, FillBehavior fillBehavior)
     : this()
 {
     this.To = toValue;
     base.Duration = duration;
     base.FillBehavior = fillBehavior;
 }

 public GridLengthAnimation(GridLength fromValue, GridLength toValue, Duration duration, FillBehavior fillBehavior)
 {
     From = fromValue;
     To = toValue;
     Duration = duration;
     FillBehavior = fillBehavior;
 }

 public RangeAnimation(Range from, Range to, Duration duration, FillBehavior fillBehavior = FillBehavior.Stop, IEasingFunction easingFunction = null)
 {
     From = from;
     To = to;
     Duration = duration;
     FillBehavior = fillBehavior;
     EasingFunction = easingFunction;
 }

 public void Begin(IRootClock rootClock)
 {
     this.rootClock = rootClock;
     VerifyRootClock();
     beginTime = rootClock.Time;
     currentFillBehavior = Timeline.FillBehavior;
     rootClock.AddClock(this);
     Tick(rootClock.Time);
 }

 public static Storyboard CreateDoubleAnimation(double? from, double? to, double duration, string propertyName, FrameworkElement target, FillBehavior? fillBehavior = null, EventHandler<object> onCompleted = null)
 {
     var animation = new DoubleAnimation 
     { 
         From = from, 
         To = to, 
         Duration = new Duration(TimeSpan.FromMilliseconds(duration)), 
         EnableDependentAnimation = true ,
         //FillBehavior = fillBehavior
         //EasingFunction = new ExponentialEase() { EasingMode = EasingMode.EaseOut }
     };
     
     if (fillBehavior.HasValue)
         animation.FillBehavior = fillBehavior.Value;
     var sb = new Storyboard();
     Storyboard.SetTarget(animation, target);
     Storyboard.SetTargetProperty(animation, propertyName);
     sb.Children.Add(animation);
     if(onCompleted != null)
         sb.Completed += onCompleted;
     return sb;
 }

 /// <summary>
 /// Creates a new CornerRadiusAnimation that will animate a
 /// CornerRadius property from the "fromValue" parameter of this constructor
 /// to the "toValue" parameter.
 /// </summary>
 public CornerRadiusAnimation(CornerRadius fromValue, CornerRadius toValue, Duration duration, FillBehavior fillBehavior)
     : this()
 {
     From = fromValue;
     To = toValue;
     Duration = duration;
     FillBehavior = fillBehavior;
 }

 /// <summary>
 /// Creates a new ByteAnimation that will animate a
 /// Byte property from the "fromValue" parameter of this constructor
 /// to the "toValue" parameter.
 /// </summary>
 public ByteAnimation(Byte fromValue, Byte toValue, Duration duration, FillBehavior fillBehavior)
     : this()
 {
     From = fromValue;
     To = toValue;
     Duration = duration;
     FillBehavior = fillBehavior;
 }

 /// <summary>
 /// Creates a new RectAnimation that will animate a
 /// Rect property from the "fromValue" parameter of this constructor
 /// to the "toValue" parameter.
 /// </summary>
 public RectAnimation(Rect fromValue, Rect toValue, Duration duration, FillBehavior fillBehavior)
     : this()
 {
     From = fromValue;
     To = toValue;
     Duration = duration;
     FillBehavior = fillBehavior;
 }

 /// <summary>
 /// Creates a new ThicknessAnimation that will animate a
 /// Thickness property from the "fromValue" parameter of this constructor
 /// to the "toValue" parameter.
 /// </summary>
 public ThicknessAnimation(Thickness fromValue, Thickness toValue, Duration duration, FillBehavior fillBehavior)
     : this()
 {
     From = fromValue;
     To = toValue;
     Duration = duration;
     FillBehavior = fillBehavior;
 }

 public Int64Animation(long fromValue, long toValue, System.Windows.Duration duration, FillBehavior fillBehavior)
 {
 }

 /// <summary>
 /// Creates a new DecimalAnimation that will animate a
 /// Decimal property from the "fromValue" parameter of this constructor
 /// to the "toValue" parameter.
 /// </summary>
 public DecimalAnimation(Decimal fromValue, Decimal toValue, Duration duration, FillBehavior fillBehavior)
     : this()
 {
     From = fromValue;
     To = toValue;
     Duration = duration;
     FillBehavior = fillBehavior;
 }

 /// <summary> 
 /// Creates a new Int16Animation that will animate a
 /// Int16 property from the "fromValue" parameter of this constructor 
 /// to the "toValue" parameter. 
 /// </summary>
 public Int16Animation(Int16 fromValue, Int16 toValue, Duration duration, FillBehavior fillBehavior) 
     : this()
 {
     From = fromValue;
     To = toValue; 
     Duration = duration;
     FillBehavior = fillBehavior; 
 } 

 /// <summary> 
 /// Creates a new Rotation3DAnimation that will animate a
 /// Rotation3D property from the "fromValue" parameter of this constructor 
 /// to the "toValue" parameter. 
 /// </summary>
 public Rotation3DAnimation(Rotation3D fromValue, Rotation3D toValue, Duration duration, FillBehavior fillBehavior) 
     : this()
 {
     From = fromValue;
     To = toValue; 
     Duration = duration;
     FillBehavior = fillBehavior; 
 } 

 /// <summary>
 /// Creates a new SingleAnimation that will animate a
 /// Single property from its base value to the value specified
 /// by the "toValue" parameter of this constructor.
 /// </summary>
 public SingleAnimation(Single toValue, Duration duration, FillBehavior fillBehavior)
     : this()
 {
     To = toValue;
     Duration = duration;
     FillBehavior = fillBehavior;
 }

 /// <summary>
 /// Creates a new ColorAnimation that will animate a
 /// Color property from the "fromValue" parameter of this constructor
 /// to the "toValue" parameter.
 /// </summary>
 public ColorAnimation(Color fromValue, Color toValue, Duration duration, FillBehavior fillBehavior)
     : this()
 {
     From = fromValue;
     To = toValue;
     Duration = duration;
     FillBehavior = fillBehavior;
 }

	public DoubleAnimation (double fromValue, double tovalue, Duration duration, FillBehavior fillBehavior)
	{
	}

	public Int32Animation (int fromValue, int tovalue, Duration duration, FillBehavior fillBehavior)
	{
	}

 public Int16Animation(short fromValue, short toValue, System.Windows.Duration duration, FillBehavior fillBehavior)
 {
 }