<Window x:Class="XamlOnly"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="XamlOnly"
Height="300" Width="300">
<Grid>
<StackPanel>
<TextBlock Name="textBlock" Margin="5"
TextAlignment="Center" Height="30"
Text="{Binding ElementName=textBox,Path=Text}" />
<TextBox Name="textBox" Margin="5" Width="200"
TextAlignment="Center" Text="Hello, WPF!" />
<Button Margin="5" Width="200" Content="Change Text Size">
<Button.Triggers>
<EventTrigger RoutedEvent="Button.Click">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation
Storyboard.TargetName="textBlock"
Storyboard.TargetProperty="FontSize" From="11" To="24"
Duration="0:0:0.2" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Button.Triggers>
</Button>
</StackPanel>
</Grid>
</Window>
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