Add project files.

Framework/WPF/Extensions/IServiceCollectionExtensions.cs

@@ -0,0 +1,18 @@
+using Microsoft.Extensions.DependencyInjection;
+using TheXamlGuy.Framework.Core;
+
+namespace TheXamlGuy.Framework.WPF
+{
+    public static class IServiceCollectionExtensions
+    {
+        public static IServiceCollection AddRequiredWpf(this IServiceCollection serviceCollection)
+        {
+            return serviceCollection
+                .AddSingleton<IRoute, Route>()
+                .AddSingleton<IRouteDescriptorCollection, RouteDescriptorCollection>()
+                .AddSingleton<IRouterContext, Router>()
+                .AddTransient<IMediatorHandler<Navigate>, NavigateHandler>()
+                .RegisterHandlers();
+        }
+    }
+}