XAML-Map-Control/MapControl/WPF/MapContentControl.WPF.cs

using System.Windows;

namespace MapControl;

public partial class MapContentControl
{
    static MapContentControl()
    {
        DefaultStyleKeyProperty.OverrideMetadata(typeof(MapContentControl), new FrameworkPropertyMetadata(typeof(MapContentControl)));
    }
}

public partial class Pushpin
{
    static Pushpin()
    {
        DefaultStyleKeyProperty.OverrideMetadata(typeof(Pushpin), new FrameworkPropertyMetadata(typeof(Pushpin)));
    }

    public static readonly DependencyProperty CornerRadiusProperty =
        DependencyPropertyHelper.Register<Pushpin, CornerRadius>(nameof(CornerRadius));

    public CornerRadius CornerRadius
    {
        get => (CornerRadius)GetValue(CornerRadiusProperty);
        set => SetValue(CornerRadiusProperty, value);
    }
}