Feature: Restart after applying update (#11191)

Author: puppetsw

src/Files.App/ServicesImplementation/SideloadUpdateService.cs

@@ -8,6 +8,7 @@
 using System.Diagnostics;
 using System.IO;
 using System.Net.Http;
+using System.Runtime.InteropServices;
 using System.Threading;
 using System.Threading.Tasks;
 using System.Xml.Serialization;
@@ -19,6 +20,9 @@ namespace Files.App.ServicesImplementation
 {
 	public sealed class SideloadUpdateService : ObservableObject, IUpdateService, IDisposable
 	{
+		[DllImport("kernel32.dll", CharSet = CharSet.Unicode)]
+		private static extern uint RegisterApplicationRestart(string pwzCommandLine, int dwFlags);
+
 		private const string SIDELOAD_STABLE = "https://cdn.files.community/files/stable/Files.Package.appinstaller";
 		private const string SIDELOAD_PREVIEW = "https://cdn.files.community/files/preview/Files.Package.appinstaller";
 
@@ -185,14 +189,18 @@ private async Task ApplyPackageUpdate()
 
 			try
 			{
+				var restartStatus = RegisterApplicationRestart(null, 0);
+
+				Logger?.Info($"Register for restart: {restartStatus}");
+
 				await Task.Run(async () =>
 				{
 					var bundlePath = new Uri(ApplicationData.Current.LocalFolder.Path + "\\" + TEMPORARY_UPDATE_PACKAGE_NAME);
 
 					var deployment = pm.RequestAddPackageAsync(
 						bundlePath,
 						null,
-						DeploymentOptions.ForceTargetApplicationShutdown,
+						DeploymentOptions.ForceApplicationShutdown,
 						pm.GetDefaultPackageVolume(),
 						null,
 						null);