In Xamarin to draw a circle around the letters?

There is a simple text control with a single literal, in my case it icons from a set of "Font Awesome"
It is located in a cell in the grid and with fixed sizes, how to draw around her a circle?
<grid horizontaloptions="FillAndExpand">
 <rowdefinition height="70">
 <columndefinition width="70">
 <columndefinition width="*">
 <frk:fontawesomeicon grid.row="0" grid.column="0" text="{Binding Source={StaticResource SomeIcon}, Converter={StaticResource nameToIconConverter}}">
June 14th 19 at 18:16
0 answer

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