Added OAuth2Live WinRT sample.

Author: Valtteri Heikkila

Release/samples/OAuth2Live/App.xaml

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+<Application
+    x:Class="OAuth2Live.App"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:local="using:OAuth2Live">
+
+    <Application.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+
+                <!-- 
+                    Styles that define common aspects of the platform look and feel
+                    Required by Visual Studio project and item templates
+                 -->
+                <ResourceDictionary Source="Common/StandardStyles.xaml"/>
+            </ResourceDictionary.MergedDictionaries>
+
+        </ResourceDictionary>
+    </Application.Resources>
+</Application>

Release/samples/OAuth2Live/App.xaml.cpp

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+//
+// App.xaml.cpp
+// Implementation of the App class.
+//
+
+#include "pch.h"
+#include "MainPage.xaml.h"
+
+using namespace OAuth2Live;
+
+using namespace Platform;
+using namespace Windows::ApplicationModel;
+using namespace Windows::ApplicationModel::Activation;
+using namespace Windows::Foundation;
+using namespace Windows::Foundation::Collections;
+using namespace Windows::UI::Xaml;
+using namespace Windows::UI::Xaml::Controls;
+using namespace Windows::UI::Xaml::Controls::Primitives;
+using namespace Windows::UI::Xaml::Data;
+using namespace Windows::UI::Xaml::Input;
+using namespace Windows::UI::Xaml::Interop;
+using namespace Windows::UI::Xaml::Media;
+using namespace Windows::UI::Xaml::Navigation;
+
+// The Blank Application template is documented at http://go.microsoft.com/fwlink/?LinkId=234227
+
+/// <summary>
+/// Initializes the singleton application object.  This is the first line of authored code
+/// executed, and as such is the logical equivalent of main() or WinMain().
+/// </summary>
+App::App()
+{
+	InitializeComponent();
+	Suspending += ref new SuspendingEventHandler(this, &App::OnSuspending);
+}
+
+/// <summary>
+/// Invoked when the application is launched normally by the end user.  Other entry points
+/// will be used when the application is launched to open a specific file, to display
+/// search results, and so forth.
+/// </summary>
+/// <param name="args">Details about the launch request and process.</param>
+void App::OnLaunched(Windows::ApplicationModel::Activation::LaunchActivatedEventArgs^ args)
+{
+	auto rootFrame = dynamic_cast<Frame^>(Window::Current->Content);
+
+	// Do not repeat app initialization when the Window already has content,
+	// just ensure that the window is active
+	if (rootFrame == nullptr)
+	{
+		// Create a Frame to act as the navigation context and associate it with
+		// a SuspensionManager key
+		rootFrame = ref new Frame();
+
+		if (args->PreviousExecutionState == ApplicationExecutionState::Terminated)
+		{
+			// TODO: Restore the saved session state only when appropriate, scheduling the
+			// final launch steps after the restore is complete
+		}
+
+		if (rootFrame->Content == nullptr)
+		{
+			// When the navigation stack isn't restored navigate to the first page,
+			// configuring the new page by passing required information as a navigation
+			// parameter
+			if (!rootFrame->Navigate(TypeName(MainPage::typeid), args->Arguments))
+			{
+				throw ref new FailureException("Failed to create initial page");
+			}
+		}
+		// Place the frame in the current Window
+		Window::Current->Content = rootFrame;
+		// Ensure the current window is active
+		Window::Current->Activate();
+	}
+	else
+	{
+		if (rootFrame->Content == nullptr)
+		{
+			// When the navigation stack isn't restored navigate to the first page,
+			// configuring the new page by passing required information as a navigation
+			// parameter
+			if (!rootFrame->Navigate(TypeName(MainPage::typeid), args->Arguments))
+			{
+				throw ref new FailureException("Failed to create initial page");
+			}
+		}
+		// Ensure the current window is active
+		Window::Current->Activate();
+	}
+}
+
+/// <summary>
+/// Invoked when application execution is being suspended.  Application state is saved
+/// without knowing whether the application will be terminated or resumed with the contents
+/// of memory still intact.
+/// </summary>
+/// <param name="sender">The source of the suspend request.</param>
+/// <param name="e">Details about the suspend request.</param>
+void App::OnSuspending(Object^ sender, SuspendingEventArgs^ e)
+{
+	(void) sender;	// Unused parameter
+	(void) e;	// Unused parameter
+
+	//TODO: Save application state and stop any background activity
+}

Release/samples/OAuth2Live/App.xaml.h

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+//
+// App.xaml.h
+// Declaration of the App class.
+//
+
+#pragma once
+
+#include "App.g.h"
+
+namespace OAuth2Live
+{
+	/// <summary>
+	/// Provides application-specific behavior to supplement the default Application class.
+	/// </summary>
+	ref class App sealed
+	{
+	public:
+		App();
+		virtual void OnLaunched(Windows::ApplicationModel::Activation::LaunchActivatedEventArgs^ args) override;
+
+	private:
+		void OnSuspending(Platform::Object^ sender, Windows::ApplicationModel::SuspendingEventArgs^ e);
+	};
+}