Replace the XAML markup with the following markup:
Add an "about" page
This is a code file that bootstraps your app.
The code in this file serves as the cross-platform entry point of the app, which configures and starts the app.
The template startup code points to the App class defined by the App.xaml file.
The .xaml file contains XAML markup
the code file contains code created by the user to interact with the XAML markup.
The App.xaml file contains app-wide XAML resources, such as colors, styles, or templates.
The App.xaml.cs file generally contains code that instantiates the Shell application.
In this project, it points to the AppShell class.
This file defines the AppShell class, which is used to define visual hierarchy of the app.
startup page displayed by the app.
The MainPage.xaml file defines the UI (user interface) of the page.
Glasp is a social web highlighter that people can highlight and organize quotes and thoughts from the web, and access other like-minded people’s learning.