Create Round Button with Border IN UWP Windows 10 C#

Question

I am trying to create a round button, with a White Border and a Transparent Background (as the old AppBarButtons in Windows 8.1) in UWP Windows 10.

I have found several

Answer 1

Another sample

Result

Or Create fully customizable cornerradius

//Create a template control xaml design

//Template control.cs

public sealed class CustomRoundedButton : Button
{
    private Grid _rootGrid = null;
    public CustomRoundedButton()
    {
        this.DefaultStyleKey = typeof(CustomRoundedButton);
    }
    protected override void OnApplyTemplate()
    {
        base.OnApplyTemplate();
        _rootGrid = GetTemplateChild("RootGrid") as Grid;
    }
    public CornerRadius CornerRadius
    {
        get { return (CornerRadius)GetValue(CornerRadiusProperty); }
        set { SetValue(CornerRadiusProperty, value); }
    }
    public static readonly DependencyProperty CornerRadiusProperty =
        DependencyProperty.Register("CornerRadius", typeof(CornerRadius), typeof(CustomRoundedButton), new PropertyMetadata(new CornerRadius(10,10,10,10)));

}

//Register to or merge dictionary from /Themes/Generic.xaml