Animation with a fast speed
<UserControl x:Class='SilverlightApplication3.MainPage'
xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation'
xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'
xmlns:d='http://schemas.microsoft.com/expression/blend/2008'
xmlns:mc='http://schemas.openxmlformats.org/markup-compatibility/2006'
mc:Ignorable='d'
d:DesignWidth='640'
d:DesignHeight='480'>
<StackPanel Margin="5">
<Rectangle Name="rect2" Fill="Green" Margin="2" Width="20"
Height="20" HorizontalAlignment="Left" />
<Button Margin="2,20,0,0" HorizontalAlignment="Left"
Content="Start Animations" Width="100">
<Button.Triggers>
<EventTrigger RoutedEvent="Button.Click">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation
Storyboard.TargetName="rect2" Storyboard.TargetProperty="Width"
From="20" To="400" Duration="0:0:10" SpeedRatio="1.5" />
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
</Button.Triggers>
</Button>
</StackPanel>
</UserControl>
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