Windows: Add AboutWindow

Elwig/Windows/AboutWindow.xaml.cs

@@ -0,0 +1,17 @@
+using System.Diagnostics;
+using System.Windows;
+using System.Windows.Navigation;
+
+namespace Elwig.Windows {
+    public partial class AboutWindow : Window {
+
+        public AboutWindow() {
+            InitializeComponent();
+            Version.Text = App.Version.ToString();
+        }
+
+        private void Hyperlink_RequestNavigate(object sender, RequestNavigateEventArgs e) {
+            Process.Start(new ProcessStartInfo(e.Uri.AbsoluteUri) { UseShellExecute = true });
+        }
+    }
+}