xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
HorizontalAlignment="Center" VerticalAlignment="Center">
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Background="{x:Null}"
Height="{x:Static SystemParameters.IconHeight}"
Content="{Binding Path=Height, RelativeSource={RelativeSource Self}}"/>