Update 'Sample Usage' README.md section

README.md

@@ -61,98 +61,65 @@ See the [`Terminal.Gui/` README](https://github.com/gui-cs/Terminal.Gui/tree/mas
 
 ## Sample Usage in C#
 
+The following example shows basic Terminal.Gui application syntax.
+
+![Simple Usage app](docfx/images/simpleusage.png)
+
 ```csharp
 // A simple Terminal.Gui example in C# - using C# 9.0 Top-level statements
 
 using Terminal.Gui;
-using NStack;
 
-Application.Init ();
+// Initialize the console
+Application.Init();
 
-// Creates the top-level window to show
-var win = new Window ("Example App") {
-	X = 0,
-	Y = 1, // Leave one row for the toplevel menu
+// Creates the top-level window with border and title
+var win = new Window("Example App (Ctrl+Q to quit)");
 
-	// By using Dim.Fill(), this Window will automatically resize without manual intervention
-	Width = Dim.Fill (),
-	Height = Dim.Fill ()
-};
+// Create input components and labels
 
-Application.Top.Add (win);
-
-// Creates a menubar, the item "New" has a help menu.
-var menu = new MenuBar (new MenuBarItem [] {
-			new MenuBarItem ("_File", new MenuItem [] {
-				new MenuItem ("_New", "Creates a new file", null),
-				new MenuItem ("_Close", "",null),
-				new MenuItem ("_Quit", "", () => { if (Quit ()) Application.Top.Running = false; })
-			}),
-			new MenuBarItem ("_Edit", new MenuItem [] {
-				new MenuItem ("_Copy", "", null),
-				new MenuItem ("C_ut", "", null),
-				new MenuItem ("_Paste", "", null)
-			})
-		});
-Application.Top.Add (menu);
-
-static bool Quit ()
+var usernameLabel = new Label("Username:");
+var usernameText = new TextField("")
 {
-	var n = MessageBox.Query (50, 7, "Quit Example", "Are you sure you want to quit this example?", "Yes", "No");
-	return n == 0;
-}
-
-var login = new Label ("Login: ") { X = 3, Y = 2 };
-var password = new Label ("Password: ") {
-	X = Pos.Left (login),
-	Y = Pos.Top (login) + 1
-};
-var loginText = new TextField ("") {
-	X = Pos.Right (password),
-	Y = Pos.Top (login),
-	Width = 40
-};
-var passText = new TextField ("") {
-	Secret = true,
-	X = Pos.Left (loginText),
-	Y = Pos.Top (password),
-	Width = Dim.Width (loginText)
-};
+    // Position text field adjacent to label
+    X = Pos.Right(usernameLabel) + 1,
 
-// Add the views to the main window, 
-win.Add (
-	// Using Computed Layout:
-	login, password, loginText, passText,
-
-	// Using Absolute Layout:
-	new CheckBox (3, 6, "Remember me"),
-	new RadioGroup (3, 8, new ustring [] { "_Personal", "_Company" }, 0),
-	new Button (3, 14, "Ok"),
-	new Button (10, 14, "Cancel"),
-	new Label (3, 18, "Press F9 or ESC plus 9 to activate the menubar")
-);
+    // Fill remaining horizontal space with a margin of 1
+    Width = Dim.Fill(1),
+};
 
-// Run blocks until the user quits the application
-Application.Run ();
+var passwordLabel = new Label(0,2,"Password:");
+var passwordText = new TextField("")
+{
+    Secret = true,
+    // align with the text box above
+    X = Pos.Left(usernameText),
+    Y = 2,
+    Width = Dim.Fill(1),
+};
 
-// Always bracket Application.Init with .Shutdown.
-Application.Shutdown ();
-```
+// Create login button
+var btnLogin = new Button("Login")
+{
+    Y = 4,
+    // center the login button horizontally
+    X = Pos.Center(),
+    IsDefault = true,
+};
 
-The example above shows adding views using both styles of layout supported by **Terminal.Gui**: **Absolute layout** and **[Computed layout](https://gui-cs.github.io/Terminal.Gui/articles/overview.html#layout)**.
+// When login button is clicked display a message popup
+btnLogin.Clicked += () => MessageBox.Query("Logging In", "Login Successful", "Ok");
 
-Alternatively, you can encapsulate the app behavior in a new `Window`-derived class, say `App.cs` containing the code above, and simplify your `Main` method to:
+// Add all the views to the window
+win.Add(
+    usernameLabel, usernameText, passwordLabel, passwordText,btnLogin
+);
 
-```csharp
-using Terminal.Gui;
+// Show the application
+Application.Run(win);
 
-class Demo {
-	static void Main ()
-	{
-		Application.Run<App> ();
-		Application.Shutdown ();
-	}
-}
+// After the application exits, release and reset console for clean shutdown
+Application.Shutdown();
 ```
 
 ## Installing