I am trying to make a GroupBox in XAML, in which there are three RadioButton s. Everything looks great except that the 'g' header in my GroupBox header GroupBox trimmed at the bottom, for example:

I read other posts with formatting problems and avoided positioning my different elements using fields. However, this does not seem to be a problem. I built everything using meshes (even inside my GroupBox ), but something else disables my header. Any input would be appreciated!
This is what GroupBox looks like when the font is normal and not bold:

Here is part of my code with GroupBox :
<Grid Grid.Row="1"> <GroupBox Header="Current Units (English)" HorizontalAlignment="Stretch" Name="currentUnitsGroupBox" VerticalAlignment="Stretch" FontSize="12" FontWeight="Bold"> <Grid> <Grid.RowDefinitions> <RowDefinition Height="6" /> <RowDefinition Height="*" /> <RowDefinition Height="4" /> </Grid.RowDefinitions> <Grid Grid.Row="1"> <Grid.ColumnDefinitions> <ColumnDefinition Width=".22*" /> <ColumnDefinition Width=".22*" /> <ColumnDefinition Width=".22*" /> <ColumnDefinition Width=".36*" /> </Grid.ColumnDefinitions> <RadioButton Content="System" HorizontalAlignment="Stretch" Name="systemRadio" VerticalAlignment="Center" FontSize="12" FontWeight="Bold" IsChecked="True" Grid.Column ="0" AutomationProperties.AutomationId="CurrentUnitsSystem"/> <RadioButton Content="English" FontSize="12" FontWeight="Bold" HorizontalAlignment="Stretch" Name="englishRadio" VerticalAlignment="Center" Grid.Column="1" AutomationProperties.AutomationId="CurrentUnitsEnglish"/> <RadioButton Content="Metric" FontSize="12" FontWeight="Bold" HorizontalAlignment="Stretch" Name="metricRadio" VerticalAlignment="Center" Grid.Column="2" AutomationProperties.AutomationId="CurrentUnitsMetric"/> </Grid> </Grid> </GroupBox> </Grid>
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