Adding WindowsProvider

Microsoft.Toolkit.Graph.Controls/Controls/LoginButton/LoginButton.cs

@@ -110,6 +110,8 @@ private async void LoadData()
             }
             else if (provider.State == ProviderState.SignedIn)
             {
+                IsLoading = true;
+
                 try
                 {
                     // https://github.com/microsoftgraph/microsoft-graph-toolkit/blob/master/src/components/mgt-login/mgt-login.ts#L139

Microsoft.Toolkit.Graph.Providers.Msal/Microsoft.Toolkit.Graph.Providers.Msal.csproj

@@ -0,0 +1,41 @@
+<Project Sdk="MSBuild.Sdk.Extras">
+
+  <PropertyGroup>
+    <TargetFramework>uap10.0.17763</TargetFramework>
+    <Title>Windows Community Toolkit Msal Graph Provider</Title>
+    <PackageId>Microsoft.Toolkit.Graph.Providers.Msal</PackageId>
+    <Description>
+      This library provides... It is part of the Windows Community Toolkit.
+
+      Classes:
+      - MsalProvider: 
+      - MsalConfig: 
+    </Description>
+    <PackageTags>UWP Toolkit Windows Controls MSAL Microsoft Graph AadLogin Login</PackageTags>
+    <SignAssembly>false</SignAssembly>
+    <GenerateLibraryLayout>true</GenerateLibraryLayout>
+    <LangVersion>8.0</LangVersion>
+    <Configurations>Debug;Release;CI</Configurations>
+    <Platforms>AnyCPU;ARM;ARM64;x64;x86</Platforms>
+  </PropertyGroup>
+
+	<ItemGroup>
+      <ProjectReference Include="..\Microsoft.Toolkit.Graph.Providers\Microsoft.Toolkit.Graph.Providers.csproj" />
+      <ProjectReference Include="..\Microsoft.Toolkit.Graph\Microsoft.Toolkit.Graph.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Graph.Beta" Version="0.37.0-preview" />
+    <PackageReference Include="Microsoft.Graph.Auth" Version="1.0.0-preview.6" />
+  </ItemGroup>
+
+  <Import Project="$(MSBuildSDKExtrasTargets)" Condition="Exists('$(MSBuildSDKExtrasTargets)')" />
+  <!-- https://weblogs.asp.net/rweigelt/disable-warnings-in-generated-c-files-of-uwp-app -->
+  <Target Name="PragmaWarningDisablePrefixer" AfterTargets="MarkupCompilePass2">
+    <ItemGroup>
+      <GeneratedCSFiles Include="**\*.g.cs;**\*.g.i.cs" />
+    </ItemGroup>
+    <Message Text="CSFiles: @(GeneratedCSFiles->'&quot;%(Identity)&quot;')" />
+    <Exec Command="for %%f in (@(GeneratedCSFiles->'&quot;%(Identity)&quot;')) do echo #pragma warning disable &gt; %%f.temp &amp;&amp; type %%f &gt;&gt; %%f.temp &amp;&amp; move /y %%f.temp %%f &gt; NUL" />
+  </Target>
+</Project>

Microsoft.Toolkit.Graph.Providers.Msal/MsalConfig.cs

@@ -0,0 +1,40 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace Microsoft.Toolkit.Graph.Providers.Msal
+{
+    /// <summary>
+    /// Configuration values for initializing the MsalProvider.
+    /// </summary>
+    public class MsalConfig : IGraphConfig
+    {
+        static MsalConfig()
+        {
+            Graph.RegisterConfig(typeof(MsalConfig), (c) => MsalProvider.Create(c as MsalConfig));
+        }
+
+        /// <summary>
+        /// Gets or sets the Client ID (the unique application (client) ID assigned to your app by Azure AD when the app was registered).
+        /// </summary>
+        /// <remarks>
+        /// For details about how to register an app and get a client ID,
+        /// see the <a href="https://docs.microsoft.com/en-us/azure/active-directory/develop/quickstart-register-app">Register an app quick start</a>.
+        /// </remarks>
+        public string ClientId { get; set; }
+
+        /// <summary>
+        /// Gets or sets the redirect URI (the URI the identity provider will send the security tokens back to).
+        /// </summary>
+        public string RedirectUri { get; set; }
+
+        /// <summary>
+        /// Gets or sets the list of Scopes (permissions) to request on initial login.
+        /// </summary>
+        /// <remarks>
+        /// This list can be modified by controls which require specific scopes to function.
+        /// This will aid in requesting all scopes required by controls used before login is initiated, if using the LoginButton.
+        /// </remarks>
+        public ScopeSet Scopes { get; set; }
+    }
+}