Superscript or subscript in TextBlock

<TextBlock Foreground="Black" FontSize="50" FontFamily="Segoe UI">
    <Run>Normal Text</Run>
    <Run Typography.Variants="Superscript" Text="Superscript123"/>
    <Run Typography.Variants="Subscript" Text="Subscript123"/>
</TextBlock>

Below is my screen shot. It seems that certain characters are not allowed in super/sub script. enter image description here

Actually I want to put a ® symbol what I'm getting is

enter image description here

and what I want is

enter image description here

P.S. I found this answer https://stackoverflow.com/a/3435675/468724 but there is no such property as BaselineAlignment

Solution

Either use Segoe WP font

Or can do like this

<StackPanel Orientation="Horizontal">
    <TextBlock FontFamily="Segoe UI" FontSize="16" Text"Normal Text"/>
    <TextBlock FontFamily="Segoe UI" FontSize="9" Text="&#174;"/>
</StackPanel>

I used 60% lesser font for trademark symbol