Add CheckComboBox

Elwig/Windows/TestWindow.xaml.cs

@@ -0,0 +1,10 @@
+using System.Windows;
+
+namespace Elwig.Windows {
+    public partial class TestWindow : Window {
+        public TestWindow() {
+            InitializeComponent();
+            _combo.ItemsSource = new string[] { "Klasse A", "Klasse B", "Klasse C", "Klasse D", "Klasse E", "Klasse F" };
+        }
+    }
+}