Bind Stroke Thickness to Slider
<StackPanel xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Polyline Margin="0.5in, 1.5in, 0, 0"
Points="0 0, 500 25, 0 50"
VerticalAlignment="Center"
Stroke="Blue"
StrokeThickness="{Binding ElementName=sliderThickness,Path=Value }"
/>
<Label Content="_Thickness" />
<Slider Name="sliderThickness"
Minimum="0"
Maximum="100"
Value="24" />
</StackPanel>
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