Fix string overloads of EditorExtensionServiceProvider.GetService() on .NET

Author: Copilot

src/PowerShellEditorServices/Extensions/Api/EditorExtensionServiceProvider.cs

@@ -116,7 +116,7 @@ public object GetServiceByAssemblyQualifiedName(string asmQualifiedTypeName)
             {
                 using (EnterPsesAlcReflectionContext())
                 {
-                    serviceType = s_psesAsm.GetType(asmQualifiedTypeName);
+                    serviceType = Type.GetType(asmQualifiedTypeName);
                 }
             }
             else

test/PowerShellEditorServices.Test/Extensions/EditorExtensionServiceProviderTests.cs

@@ -0,0 +1,68 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+using System.Threading.Tasks;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging.Abstractions;
+using Microsoft.PowerShell.EditorServices.Extensions.Services;
+using Microsoft.PowerShell.EditorServices.Services.Extension;
+using Microsoft.PowerShell.EditorServices.Services.PowerShell.Host;
+using Microsoft.PowerShell.EditorServices.Test;
+using Xunit;
+using WorkspaceService = Microsoft.PowerShell.EditorServices.Services.WorkspaceService;
+
+namespace PowerShellEditorServices.Test.Extensions
+{
+    [Trait("Category", "Extensions")]
+    public class EditorExtensionServiceProviderTests : IAsyncLifetime
+    {
+        private PsesInternalHost psesHost;
+
+        private WorkspaceService workspaceService;
+
+        private EditorExtensionServiceProvider serviceProvider;
+
+        public async Task InitializeAsync()
+        {
+            psesHost = await PsesHostFactory.Create(NullLoggerFactory.Instance);
+
+            ExtensionService extensionService = new(
+                languageServer: null,
+                serviceProvider: null,
+                editorOperations: null,
+                executionService: psesHost);
+            await extensionService.InitializeAsync();
+
+            workspaceService = new WorkspaceService(NullLoggerFactory.Instance);
+
+            ServiceCollection services = new();
+            services.AddSingleton(extensionService);
+            services.AddSingleton(workspaceService);
+
+            serviceProvider = new EditorExtensionServiceProvider(services.BuildServiceProvider());
+        }
+
+        public async Task DisposeAsync() => await psesHost.StopAsync();
+
+        [Fact]
+        public void GetServiceByFullTypeNameReturnsService() =>
+            Assert.Same(
+                workspaceService,
+                serviceProvider.GetService("Microsoft.PowerShell.EditorServices.Services.WorkspaceService"));
+
+        [Fact]
+        public void GetServiceByTypeNameAndAssemblyNameReturnsService() =>
+            Assert.Same(
+                workspaceService,
+                serviceProvider.GetService(
+                    "Microsoft.PowerShell.EditorServices.Services.WorkspaceService",
+                    "Microsoft.PowerShell.EditorServices"));
+
+        [Fact]
+        public void GetServiceByAssemblyQualifiedNameReturnsService() =>
+            Assert.Same(
+                workspaceService,
+                serviceProvider.GetServiceByAssemblyQualifiedName(
+                    "Microsoft.PowerShell.EditorServices.Services.WorkspaceService, Microsoft.PowerShell.EditorServices"));
+    }
+}