   [.net] [SilverLight / Wp7] Animate FontSize
  In the Win Phone 7 version of Silverlight, I am trying to animate the FontSize property of a TextBlock.  I am getting an unhelpful error that I usually get when I specify a property that a dependency doesn't contain.Code looks like this, //animate text size DoubleAnimation da = new DoubleAnimation(); da.Duration = new Duration(TimeSpan.FromSeconds(4.0)); da.From = 10; da.To = 30; Storyboard sbText = new Storyboard(); sbText.Duration = TimeSpan.FromSeconds(4.0); Storyboard.SetTarget(da, gameResult); Storyboard.SetTargetProperty(da, new PropertyPath(FontSizeProperty)); sbText.Children.Add(da); sbText.Begin(); //Unhelpful error on this call gameResult.Text = "Player Busted!";Are there a lot of issues with property animations like this?  Another thing I was trying to do was animate a Margin property of an Image, but there is no MarginProperty (and the MSDN docs note that it's missing).[Edited by - ferr on May 8, 2010 7:36:28 PM]
  The company I work for creates Kiosk applications, and we use WPF.  This is basically how we do the bulk of our animations for our transitions, but you need to make a few adjustments:DoubleAnimation da = new DoubleAnimation();da.Duration = new Duration(TimeSpan.FromSeconds(4.0));da.From = 10;da.To = 30;Storyboard sbText = new Storyboard();// you don't need to set storyboard's duration.  it will be set to double animation's// use SetTargetName, and pass in the TextBlock object's nameStoryboard.SetTargetName(da, gameResult.Name);// Make sure you are using TextBlock.FontSizePropertyStoryboard.SetTargetProperty(da, new  PropertyPath(TextBlock.FontSizeProperty));sbText.Children.Add(da);sbText.Begin(this);gameResult.Text = "Player Busted!";And to answer your last question, there is a MarginProperty for Image.  When you are setting the TargetProperty, be sure you are using new PropertyPath(TextBlock.FontSizeProperty) or new PropertyPath(Image.MarginProperty)   