Works, and shows the problem with lack of clipping for Window objects

demo.cs

@@ -3,7 +3,9 @@ using Terminal;
 class Demo {
     static void Main ()
     {
-        var app = new Application ();
-        
+        Application.Init ();
+        var top = Application.Top;
+        top.Add (new Window (new Rect (10, 10, 20, 20), "Hello"));
+        Application.Run ();
     }
 }