wpf - Measure Maximum Fontsize for a control -

lets have 5 textblocks on screen each same size.

i have 5 items display (of varying length)

• 10
• 100
• 1111
• 99
• 9192

is there way wpf calculate largest fontsize usable textblocks text fit in it's respective textblock, fontsizes same?

use viewbox

        <viewbox>             <stackpanel>                 <textblock text="10"/>                 <textblock text="100"/>                 <textblock text="1111"/>             </stackpanel>         </viewbox> 

then inside viewbox scale fit size available viewbox, regardless of font size.