添加xamarinFormApp例子,安卓,iOS,WPF

Examples/xamarinFormApp/xamarinFormApp/GettingStarted.txt

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+Welcome to Xamarin.Forms! Here are some tips to get started building your app.
+
+Building Your App UI
+--------------------
+
+XAML Hot Reload quickly applies UI changes as you make them to your running app.
+This is the most productive way to preview and iteratively create your UI.
+
+Try it out:
+
+1. Run the app by clicking the Start Debugging (play) button in the above toolbar. 
+2. Open <MainProject>\Views\AboutPage.xaml.
+   Don't stop the app - keep it running while making changes.
+3. Change something! Hint: change the Accent color on line 14 from "#96d1ff" to "Pink". Save the file.
+4. Watch the About screen update on the device or emulator, with the logo background now pink.
+
+Keep going and try more changes!
+
+QuickStart Guide
+----------------
+
+Learn more of the fundamentals for building apps with Xamarin here: https://aka.ms/xamarin-quickstart
+
+Your App Shell
+--------------
+
+This template uses Shell, an app container that reduces the complexity of your apps by providing fundamental features including:
+
+- A single place to describe the app's visual hierarchy.
+- Common navigation such as a flyout menu and tabs.
+- A URI-based navigation scheme that permits navigation to any page in the application.
+- An integrated search handler.
+
+Open AppShell.xaml to begin exploring. To learn more about Shell visit: https://docs.microsoft.com/xamarin/xamarin-forms/app-fundamentals/shell/introduction