refactor<*>: rewrite all codes...

src/Views/Upgrade.xaml.cs

@@ -0,0 +1,34 @@
+using System.Diagnostics;
+using System.Windows;
+
+namespace SourceGit.Views {
+    /// <summary>
+    ///     新版本提示窗口
+    /// </summary>
+    public partial class Upgrade : Window {
+        public Models.Version Version { get; set; } = new Models.Version();
+
+        public Upgrade(Models.Version ver) {
+            Version = ver;
+            InitializeComponent();
+            txtRelease.Text = App.Text("UpdateAvailable.Title", ver.Name);
+        }
+
+        public static void Open(Window owner, Models.Version ver) {
+            var dialog = new Upgrade(ver) { Owner = owner };
+            dialog.ShowDialog();
+        }
+
+        private void Download(object sender, RoutedEventArgs e) {
+            var info = new ProcessStartInfo("cmd", $"/c start https://gitee.com/sourcegit/SourceGit/releases/{Version.TagName}");
+            info.CreateNoWindow = true;
+
+            Process.Start(info);
+            e.Handled = true;
+        }
+
+        private void Quit(object sender, RoutedEventArgs e) {
+            Close();
+        }
+    }
+}