Addressed pr feedback, export parts as shared and in the correct layer.

Roslyn.sln

 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 15
-VisualStudioVersion = 15.0.26228.4
+VisualStudioVersion = 15.0.26507.0
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Core", "Core", "{A41D1B99-F489-4C43-BBDF-96D61B19A6B9}"
 EndProject

src/EditorFeatures/Core/Implementation/InfoBar/EditorInfoBarService.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
+using System.Composition;
 using Microsoft.CodeAnalysis.Extensions;
 using Microsoft.CodeAnalysis.Host.Mef;
 using Microsoft.CodeAnalysis.Internal.Log;
 
 namespace Microsoft.CodeAnalysis.Editor.Implementation.Workspaces
 {
-    [ExportWorkspaceService(typeof(IInfoBarService))]
+    [ExportWorkspaceService(typeof(IInfoBarService)), Shared]
     internal class EditorInfoBarService : IInfoBarService
     {
         public void ShowInfoBarInActiveView(string message, params InfoBarUI[] items)
-        {
-            ShowInfoBarInGlobalView(message, items);
-        }
+            => ShowInfoBarInGlobalView(message, items);
 
         public void ShowInfoBarInGlobalView(string message, params InfoBarUI[] items)
-        {
-            Logger.Log(FunctionId.Extension_InfoBar, message);
-        }
+            => Logger.Log(FunctionId.Extension_InfoBar, message);
     }
 }

src/VisualStudio/Core/Def/Implementation/InfoBar/VisualStudioInfoBarService.cs

@@ -2,7 +2,7 @@
 
 using System;
 using System.Collections.Generic;
-using System.ComponentModel.Composition;
+using System.Composition;
 using System.Linq;
 using Microsoft.CodeAnalysis.Editor;
 using Microsoft.CodeAnalysis.Editor.Shared.Utilities;
@@ -16,15 +16,15 @@
 
 namespace Microsoft.VisualStudio.LanguageServices.Implementation
 {
-    [ExportWorkspaceService(typeof(IInfoBarService))]
+    [ExportWorkspaceService(typeof(IInfoBarService), layer: ServiceLayer.Host), Shared]
     internal class VisualStudioInfoBarService : ForegroundThreadAffinitizedObject, IInfoBarService
     {
-        private readonly IServiceProvider _serviceProvider;
+        private readonly SVsServiceProvider _serviceProvider;
         private readonly IForegroundNotificationService _foregroundNotificationService;
         private readonly IAsynchronousOperationListener _listener;
 
         [ImportingConstructor]
-        public VisualStudioInfoBarService([Import(typeof(SVsServiceProvider))] IServiceProvider serviceProvider,
+        public VisualStudioInfoBarService(SVsServiceProvider serviceProvider,
             IForegroundNotificationService foregroundNotificationService,
             [ImportMany] IEnumerable<Lazy<IAsynchronousOperationListener, FeatureMetadata>> asyncListeners)
         {
@@ -54,7 +54,7 @@ private void ShowInfoBar(bool activeView, string message, params InfoBarUI[] ite
                 {
                     CreateInfoBar(infoBarHost, message, items);
                 }
-            }, _listener.BeginAsyncOperation("Show InfoBar"));
+            }, _listener.BeginAsyncOperation(nameof(ShowInfoBar)));
         }
 
         private bool TryGetInfoBarData(bool activeView, out IVsInfoBarHost infoBarHost)

src/VisualStudio/Core/Def/Implementation/Workspace/VisualStudioErrorReportingServiceFactory.cs

@@ -23,6 +23,7 @@ public IWorkspaceService CreateService(HostWorkspaceServices workspaceServices)
             {
                 _singleton = new VisualStudioErrorReportingService(workspaceServices.GetRequiredService<IInfoBarService>());
             }
+
             return _singleton;
         }
     }