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

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;

namespace MapControl
{
    public partial class GeoImage : FrameworkElement
    {


        public BitmapSource Source
        {
            get { return (BitmapSource)GetValue(SourceProperty); }
            set { SetValue(SourceProperty, value); }
        }

        public static readonly DependencyProperty SourceProperty =
            DependencyProperty.Register(nameof(Source), typeof(BitmapSource), typeof(GeoImage),
                new FrameworkPropertyMetadata(null, FrameworkPropertyMetadataOptions.AffectsRender));

        protected override void OnRender(DrawingContext drawingContext)
        {
            if (Source != null)
            {
                drawingContext.DrawImage(Source, new Rect(RenderSize));
            }
        }
    }
}