Fixed the build

sample/Comet.Android.Sample/MainApplication.cs

@@ -3,6 +3,7 @@ using Android.App;
 using Android.Runtime;
 using Microsoft.Maui;
 using Comet.Samples;
+using Microsoft.Maui.Hosting;
 
 namespace Comet.Android.Sample
 {

sample/Comet.iOS.Sample/AppDelegate.cs

@@ -6,6 +6,7 @@ using MapKit;
 using UIKit;
 using Microsoft.Maui;
 using Microsoft.Maui.HotReload;
+using Microsoft.Maui.Hosting;
 
 namespace Comet.iOS.Sample
 {

src/Comet/Controls/AbstractLayout.cs

@@ -14,7 +14,7 @@ namespace Comet
 		public ILayoutManager LayoutManager => layout ??= CreateLayoutManager();
 		public ILayoutHandler LayoutHandler => ViewHandler as ILayoutHandler;
 
-		Thickness ILayout.Padding => this.GetPadding();
+		Thickness IPadding.Padding => this.GetPadding();
 
 		protected override void OnAdded(View view)
 		{

src/Comet/Controls/View.cs

@@ -757,6 +757,8 @@ namespace Comet
 
 		public string Title => this.GetTitle();
 
+		IShadow IView.Shadow => this.GetEnvironment<IShadow>(nameof(IView.Shadow));
+
 		Size IView.Arrange(Rectangle bounds)
 		{
 			LayoutSubviews(bounds);

src/Comet/Maui/CometWindow.cs

@@ -52,5 +52,7 @@ namespace Comet
 		{
 
 		}
+
+		bool IWindow.BackButtonPressed() => true;
 	}
 }