Implement DefaultBrowserServiceProvider using Microsoft.Extensions.DependencyInjection.ServiceCollection

src/Microsoft.AspNetCore.Blazor.Browser/Microsoft.AspNetCore.Blazor.Browser.csproj

@@ -4,6 +4,10 @@
     <TargetFramework>netstandard2.0</TargetFramework>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="2.0.0" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\Microsoft.AspNetCore.Blazor\Microsoft.AspNetCore.Blazor.csproj" />
   </ItemGroup>

src/Microsoft.AspNetCore.Blazor.Browser/Services/DefaultBrowserServiceProvider.cs

@@ -1,6 +1,7 @@
 // Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
+using Microsoft.Extensions.DependencyInjection;
 using System;
 
 namespace Microsoft.AspNetCore.Blazor.Browser.Services
@@ -11,10 +12,34 @@ namespace Microsoft.AspNetCore.Blazor.Browser.Services
     /// </summary>
     public class DefaultBrowserServiceProvider : IServiceProvider
     {
+        private readonly IServiceProvider _underlyingProvider;
+
+        /// <summary>
+        /// Constructs an instance of <see cref="DefaultBrowserServiceProvider"/>.
+        /// </summary>
+        public DefaultBrowserServiceProvider(): this(null)
+        {
+        }
+
+        /// <summary>
+        /// Constructs an instance of <see cref="DefaultBrowserServiceProvider"/>.
+        /// </summary>
+        /// <param name="configure">A callback that can be used to configure the <see cref="IServiceCollection"/>.</param>
+        public DefaultBrowserServiceProvider(Action<IServiceCollection> configure)
+        {
+            var serviceCollection = new ServiceCollection();
+            AddDefaultServices(serviceCollection);
+            configure?.Invoke(serviceCollection);
+            _underlyingProvider = serviceCollection.BuildServiceProvider();
+        }
+
         /// <inheritdoc />
         public object GetService(Type serviceType)
+            => _underlyingProvider.GetService(serviceType);
+
+        private void AddDefaultServices(ServiceCollection serviceCollection)
         {
-            throw new NotImplementedException();
+            // TODO: Add default services for HttpClient, IUrlHelper, etc.
         }
     }
 }