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<StackPanel>
<TextBlock>
<Run Text="{Binding Strain}"></Run>
<Run Text="/"></Run>
<Run Text="{Binding MaximumStrain}"></Run>
</TextBlock>
</StackPanel>
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<TextBlock>
<TextBlock.Text>
<MultiBinding StringFormat="{}{0} + {1}">
<Binding Path="Name" />
<Binding Path="ID" />
</MultiBinding>
</TextBlock.Text>
</TextBlock>