basic MDM implementation for all platforms

XAM-MDM/MauiApp1/App.xaml

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+<?xml version = "1.0" encoding = "UTF-8" ?>
+<Application xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:local="clr-namespace:MauiApp1"
+             x:Class="MauiApp1.App">
+    <Application.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+                <ResourceDictionary Source="Resources/Styles/Colors.xaml" />
+                <ResourceDictionary Source="Resources/Styles/Styles.xaml" />
+            </ResourceDictionary.MergedDictionaries>
+        </ResourceDictionary>
+    </Application.Resources>
+</Application>

XAM-MDM/MauiApp1/App.xaml.cs

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+namespace MauiApp1;
+
+public partial class App : Application
+{
+	public App()
+	{
+		InitializeComponent();
+
+		MainPage = new AppShell();
+	}
+}

XAM-MDM/MauiApp1/AppShell.xaml

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+<?xml version="1.0" encoding="UTF-8" ?>
+<Shell
+    x:Class="MauiApp1.AppShell"
+    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+    xmlns:local="clr-namespace:MauiApp1"
+    Shell.FlyoutBehavior="Disabled">
+
+    <ShellContent
+        Title="Home"
+        ContentTemplate="{DataTemplate local:MainPage}"
+        Route="MainPage" />
+
+</Shell>

XAM-MDM/MauiApp1/AppShell.xaml.cs

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+namespace MauiApp1;
+
+public partial class AppShell : Shell
+{
+	public AppShell()
+	{
+		InitializeComponent();
+	}
+}

XAM-MDM/MauiApp1/MainPage.xaml

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+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="MauiApp1.MainPage">
+
+    <ScrollView>
+        <VerticalStackLayout
+            Spacing="25"
+            Padding="30,0"
+            VerticalOptions="Center">
+
+            <Image
+                Source="intune.png"
+                HeightRequest="100"
+                HorizontalOptions="Center" />
+
+            <Label
+                Text="ManagedConfiguration key 'MyMDMConfigKey' value"
+                FontSize="20"
+                HorizontalOptions="Center" />
+
+            <Label
+                x:Name="lblConfig"
+                Text=""
+                FontSize="32"
+                HorizontalOptions="Center" />
+
+            <Button
+                x:Name="btnRefresh"
+                Text="Refresh Managed Configuration"
+                Clicked="OnBtnRefreshClicked"
+                HorizontalOptions="Center" />
+
+        </VerticalStackLayout>
+    </ScrollView>
+
+</ContentPage>

XAM-MDM/MauiApp1/MainPage.xaml.cs

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+namespace MauiApp1;
+
+public partial class MainPage : ContentPage
+{
+    public const string MyMDMConfigKey = "MyMDMConfigKey";
+
+    private readonly ManagedConfigurationProvider managedConfigurationProvider;
+
+    public MainPage()
+	{
+		InitializeComponent();
+
+		this.managedConfigurationProvider = new ManagedConfigurationProvider();
+    }
+
+    protected override void OnAppearing()
+    {
+        base.OnAppearing();
+
+        lblConfig.Text = managedConfigurationProvider.GetStringValue(MyMDMConfigKey);
+    }
+
+    private void OnBtnRefreshClicked(object sender, EventArgs e)
+	{
+        lblConfig.Text = managedConfigurationProvider.GetStringValue(MyMDMConfigKey);
+    }
+}
+

XAM-MDM/MauiApp1/ManagedConfigurationProvider.cs

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+namespace MauiApp1
+{
+    public partial class ManagedConfigurationProvider
+    {
+        public partial string GetStringValue(string key);
+    }
+}

XAM-MDM/MauiApp1/MauiProgram.cs

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+using Microsoft.Extensions.Logging;
+
+namespace MauiApp1;
+
+public static class MauiProgram
+{
+	public static MauiApp CreateMauiApp()
+	{
+		var builder = MauiApp.CreateBuilder();
+		builder
+			.UseMauiApp<App>()
+			.ConfigureFonts(fonts =>
+			{
+				fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
+				fonts.AddFont("OpenSans-Semibold.ttf", "OpenSansSemibold");
+			});
+
+#if DEBUG
+		builder.Logging.AddDebug();
+#endif
+
+		return builder.Build();
+	}
+}

XAM-MDM/MauiApp1/Platforms/Android/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+	<application android:allowBackup="true" android:icon="@mipmap/appicon" android:roundIcon="@mipmap/appicon_round" android:supportsRtl="true">
+		<meta-data android:name="android.content.APP_RESTRICTIONS" android:resource="@xml/app_restrictions" />
+	</application>
+	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+	<uses-permission android:name="android.permission.INTERNET" />
+</manifest>

XAM-MDM/MauiApp1/Platforms/Android/MainActivity.cs

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+using Android.App;
+using Android.Content.PM;
+using Android.OS;
+
+namespace MauiApp1;
+
+[Activity(Theme = "@style/Maui.SplashTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation | ConfigChanges.UiMode | ConfigChanges.ScreenLayout | ConfigChanges.SmallestScreenSize | ConfigChanges.Density)]
+public class MainActivity : MauiAppCompatActivity
+{
+}

XAM-MDM/MauiApp1/Platforms/Android/MainApplication.cs

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+using Android.App;
+using Android.Runtime;
+
+namespace MauiApp1;
+
+[Application]
+public class MainApplication : MauiApplication
+{
+	public MainApplication(IntPtr handle, JniHandleOwnership ownership)
+		: base(handle, ownership)
+	{
+	}
+
+	protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
+}

XAM-MDM/MauiApp1/Platforms/Android/ManagedConfigurationProvider.cs

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+using Android.Content;
+
+namespace MauiApp1
+{
+    public partial class ManagedConfigurationProvider
+    {
+        public partial string GetStringValue(string key)
+        {
+            var manager = (RestrictionsManager)Platform.AppContext.GetSystemService(Context.RestrictionsService);
+            var bundle = manager.ApplicationRestrictions;
+
+            if (bundle != null)
+            {
+                if (bundle.ContainsKey(key))
+                    return bundle.GetString(key);
+                else
+                    return null;
+            }
+
+            return null;
+        }
+    }
+}

XAM-MDM/MauiApp1/Platforms/Android/Resources/values/colors.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#512BD4</color>
+    <color name="colorPrimaryDark">#2B0B98</color>
+    <color name="colorAccent">#2B0B98</color>
+</resources>

XAM-MDM/MauiApp1/Platforms/Android/Resources/values/strings.xml

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+<?xml version="1.0" encoding="utf-8" ?>
+<resources>
+	<string name="MyMDMConfigKey">MyMDMConfigKey</string>
+</resources>

XAM-MDM/MauiApp1/Platforms/Android/Resources/xml/app_restrictions.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<restrictions xmlns:android="http://schemas.android.com/apk/res/android">
+	<restriction
+        android:title="@string/MyMDMConfigKey"
+        android:key="MyMDMConfigKey"
+        android:restrictionType="string"
+        android:defaultValue=""/>
+</restrictions>

XAM-MDM/MauiApp1/Platforms/Windows/App.xaml

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+<maui:MauiWinUIApplication
+    x:Class="MauiApp1.WinUI.App"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:maui="using:Microsoft.Maui"
+    xmlns:local="using:MauiApp1.WinUI">
+
+</maui:MauiWinUIApplication>

XAM-MDM/MauiApp1/Platforms/Windows/App.xaml.cs

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+using Microsoft.UI.Xaml;
+
+// To learn more about WinUI, the WinUI project structure,
+// and more about our project templates, see: http://aka.ms/winui-project-info.
+
+namespace MauiApp1.WinUI;
+
+/// <summary>
+/// Provides application-specific behavior to supplement the default Application class.
+/// </summary>
+public partial class App : MauiWinUIApplication
+{
+	/// <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>
+	public App()
+	{
+		this.InitializeComponent();
+	}
+
+	protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
+}
+

XAM-MDM/MauiApp1/Platforms/Windows/ManagedConfigurationProvider.cs

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+using Windows.Storage;
+
+namespace MauiApp1
+{
+    public partial class ManagedConfigurationProvider
+    {
+        public const string MangedConfigurationKey = "Managed.App.Settings";
+
+        public partial string GetStringValue(string key)
+        {
+            ApplicationDataContainer container = null;
+            if (ApplicationData.Current.LocalSettings.Containers.TryGetValue(MangedConfigurationKey, out container))
+            {
+                object value = null;
+                if (container.Values.TryGetValue(key, out value) && value != null)
+                    return value.ToString();
+            }
+
+            return null;
+        }
+    }
+}

XAM-MDM/MauiApp1/Platforms/Windows/Package.appxmanifest

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+<?xml version="1.0" encoding="utf-8"?>
+<Package
+  xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
+  xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
+  xmlns:mp="http://schemas.microsoft.com/appx/2014/phone/manifest"
+  xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities"
+  IgnorableNamespaces="uap rescap">
+
+  <Identity Name="maui-package-name-placeholder" Publisher="CN=User Name" Version="0.0.0.0" />
+
+  <mp:PhoneIdentity PhoneProductId="022F5989-BFC0-46E5-9FC7-281232C29806" PhonePublisherId="00000000-0000-0000-0000-000000000000"/>
+
+  <Properties>
+    <DisplayName>$placeholder$</DisplayName>
+    <PublisherDisplayName>User Name</PublisherDisplayName>
+    <Logo>$placeholder$.png</Logo>
+  </Properties>
+
+  <Dependencies>
+    <TargetDeviceFamily Name="Windows.Universal" MinVersion="10.0.17763.0" MaxVersionTested="10.0.19041.0" />
+    <TargetDeviceFamily Name="Windows.Desktop" MinVersion="10.0.17763.0" MaxVersionTested="10.0.19041.0" />
+  </Dependencies>
+
+  <Resources>
+    <Resource Language="x-generate" />
+  </Resources>
+
+  <Applications>
+    <Application Id="App" Executable="$targetnametoken$.exe" EntryPoint="$targetentrypoint$">
+      <uap:VisualElements
+        DisplayName="$placeholder$"
+        Description="$placeholder$"
+        Square150x150Logo="$placeholder$.png"
+        Square44x44Logo="$placeholder$.png"
+        BackgroundColor="transparent">
+        <uap:DefaultTile Square71x71Logo="$placeholder$.png" Wide310x150Logo="$placeholder$.png" Square310x310Logo="$placeholder$.png" />
+        <uap:SplashScreen Image="$placeholder$.png" />
+      </uap:VisualElements>
+    </Application>
+  </Applications>
+
+  <Capabilities>
+    <rescap:Capability Name="runFullTrust" />
+  </Capabilities>
+
+</Package>

XAM-MDM/MauiApp1/Platforms/Windows/app.manifest

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+<?xml version="1.0" encoding="utf-8"?>
+<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1">
+  <assemblyIdentity version="1.0.0.0" name="MauiApp1.WinUI.app"/>
+
+  <application xmlns="urn:schemas-microsoft-com:asm.v3">
+    <windowsSettings>
+      <!-- The combination of below two tags have the following effect:
+           1) Per-Monitor for >= Windows 10 Anniversary Update
+           2) System < Windows 10 Anniversary Update
+      -->
+      <dpiAware xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">true/PM</dpiAware>
+      <dpiAwareness xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">PerMonitorV2, PerMonitor</dpiAwareness>
+    </windowsSettings>
+  </application>
+</assembly>

XAM-MDM/MauiApp1/Platforms/iOS/AppDelegate.cs

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+using Foundation;
+
+namespace MauiApp1;
+
+[Register("AppDelegate")]
+public class AppDelegate : MauiUIApplicationDelegate
+{
+	protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
+}

XAM-MDM/MauiApp1/Platforms/iOS/Info.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UIDeviceFamily</key>
+	<array>
+		<integer>1</integer>
+		<integer>2</integer>
+	</array>
+	<key>UIRequiredDeviceCapabilities</key>
+	<array>
+		<string>arm64</string>
+	</array>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>XSAppIconAssets</key>
+	<string>Assets.xcassets/appicon.appiconset</string>
+</dict>
+</plist>