Add template project

Template/UpdateCheck.cs

@@ -0,0 +1,50 @@
+using System.Threading.Tasks;
+using System.Windows;
+using NuGet.Versioning;
+using Serilog;
+using Velopack;
+using Velopack.Sources;
+
+namespace Template;
+
+internal static class UpdateCheck
+{
+    private static UpdateManager _updateManager;
+
+    public static UpdateManager UpdateManager => _updateManager ??= new UpdateManager(new GithubSource("https://github.com/user/Template", null, false));
+
+    public static string LocalVersion => (UpdateManager.CurrentVersion ?? new SemanticVersion(0, 0, 0)).ToString();
+
+    public static bool IsInstalled => UpdateManager.IsInstalled;
+
+    public static async Task DisplayUpdateInformation(bool showIfCurrent)
+    {
+        var newVersion = IsInstalled ? await UpdateManager.CheckForUpdatesAsync() : null;
+
+        if (newVersion != null)
+        {
+            var updateCheckTitle = string.Format(Properties.Resources.UpdateCheckTitle, Properties.Resources.ApplicationName);
+
+            var updateCheckMessage = string.Format(Properties.Resources.UpdateCheckNewVersion, newVersion.TargetFullRelease.Version);
+
+            if (MessageBox.Show(updateCheckMessage, updateCheckTitle, MessageBoxButton.YesNo, MessageBoxImage.Question) != MessageBoxResult.Yes)
+                return;
+
+            Log.Logger.Information("Downloading update");
+
+            await UpdateManager.DownloadUpdatesAsync(newVersion);
+
+            Log.Logger.Information("Installing update");
+
+            UpdateManager.ApplyUpdatesAndRestart(newVersion);
+        }
+        else if (showIfCurrent)
+        {
+            var updateCheckTitle = string.Format(Properties.Resources.UpdateCheckTitle, Properties.Resources.ApplicationName);
+
+            var updateCheckMessage = string.Format(Properties.Resources.UpdateCheckCurrent, Properties.Resources.ApplicationName);
+
+            MessageBox.Show(updateCheckMessage, updateCheckTitle, MessageBoxButton.OK, MessageBoxImage.Information);
+        }
+    }
+}