testing improve this doc...

docfx/overrides/Terminal_Gui_Application.md

@@ -0,0 +1,8 @@
+---
+uid: Terminal.Gui.Application
+summary: '*You can override summary for the API here using *MARKDOWN* syntax'
+---
+
+*Please type below more information about this API:*
+
+![Sample](images/sample.png)