<Grid  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
        <Grid.Resources>
            <ControlTemplate x:Key="ButtonTemplate">
    
                    <Ellipse x:Name="backgroundLayer" Fill="#FF075066"/>
 
            </ControlTemplate>
        </Grid.Resources>
        <Button Template="{StaticResource ButtonTemplate}" Width="110" Height="110"/>
    </Grid>