WPF uses both .Desktop and .WPF

samples/WPFSample/WPFSample/MainWindow.xaml.cs

@@ -11,6 +11,7 @@ using System.Windows.Forms.Integration;
 using System.Windows.Input;
 using System.Windows.Threading;
 using SkiaSharp;
+using SkiaSharp.Views.Desktop;
 using SkiaSharp.Views.WPF;
 
 namespace SkiaSharpSample.WPFSample