diff --git a/Demo.WindowsPresentation/CustomMarkers/Circle.xaml.cs b/Demo.WindowsPresentation/CustomMarkers/Circle.xaml.cs
new file mode 100644
--- /dev/null
+++ b/Demo.WindowsPresentation/CustomMarkers/Circle.xaml.cs
@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+using GMap.NET;
+
+namespace Demo.WindowsPresentation.CustomMarkers
+{
+   /// <summary>
+   /// Interaction logic for Circle.xaml
+   /// </summary>
+   public partial class Circle : UserControl
+   {
+      public Circle()
+      {
+         InitializeComponent();
+      }
+
+      public PointLatLng Center;
+      public PointLatLng Bound;
+   }
+}