Updated docfx and fixed most warnings

docfx/docs/getting-started.md

@@ -2,7 +2,7 @@
 
 Paste these commands into your favorite terminal on Windows, Mac, or Linux. This will install the [Terminal.Gui.Templates](https://github.com/gui-cs/Terminal.Gui.templates), create a new "Hello World" TUI app, and run it.
 
-(Press `CTRL-Q` to exit the app)
+(Press `Esc` to exit the app)
 
 ```ps1
 dotnet new --install Terminal.Gui.templates
@@ -25,79 +25,9 @@ Use the [Terminal.Gui.Templates](https://github.com/gui-cs/Terminal.Gui.template
 
 ## Sample Usage in C#
 
-The following example shows a basic Terminal.Gui application in C#:
+The following example shows a basic Terminal.Gui application in C# (this is `./Example/Example.cs`):
 
-```csharp
-// A simple Terminal.Gui example in C# - using C# 9.0 Top-level statements
-
-using Terminal.Gui;
-
-Application.Run<ExampleWindow> ();
-
-System.Console.WriteLine ($"Username: {((ExampleWindow)Application.Top).usernameText.Text}");
-
-// Before the application exits, reset Terminal.Gui for clean shutdown
-Application.Shutdown ();
-
-// Defines a top-level window with border and title
-public class ExampleWindow : Window {
-	public TextField usernameText;
-	
-	public ExampleWindow ()
-	{
-		Title = "Example App (Ctrl+Q to quit)";
-
-		// Create input components and labels
-		var usernameLabel = new Label () { 
-			Text = "Username:" 
-		};
-
-		usernameText = new TextField ("") {
-			// Position text field adjacent to the label
-			X = Pos.Right (usernameLabel) + 1,
-
-			// Fill remaining horizontal space
-			Width = Dim.Fill (),
-		};
-
-		var passwordLabel = new Label () {
-			Text = "Password:",
-			X = Pos.Left (usernameLabel),
-			Y = Pos.Bottom (usernameLabel) + 1
-		};
-
-		var passwordText = new TextField ("") {
-			Secret = true,
-			// align with the text box above
-			X = Pos.Left (usernameText),
-			Y = Pos.Top (passwordLabel),
-			Width = Dim.Fill (),
-		};
-
-		// Create login button
-		var btnLogin = new Button () {
-			Text = "Login",
-			Y = Pos.Bottom(passwordLabel) + 1,
-			// center the login button horizontally
-			X = Pos.Center (),
-			IsDefault = true,
-		};
-
-		// When login button is clicked display a message popup
-		btnLogin.Clicked += () => {
-			if (usernameText.Text == "admin" && passwordText.Text == "password") {
-				MessageBox.Query ("Logging In", "Login Successful", "Ok");
-				Application.RequestStop ();
-			} else {
-				MessageBox.ErrorQuery ("Logging In", "Incorrect username or password", "Ok");
-			}
-		};
-
-		// Add the views to the Window
-		Add (usernameLabel, usernameText, passwordLabel, passwordText, btnLogin);
-	}
-}
-```
+[!code-csharp[Program.cs](../../Example/Example.cs)]
 
 When run the application looks as follows: