Actually export the service.

src/EditorFeatures/CSharpTest/Diagnostics/AddUsing/AddUsingTests.cs

@@ -4373,6 +4373,43 @@ class C
 compareTokens: false);
         }
 
+        [Fact, Trait(Traits.Feature, Traits.Features.CodeActionsAddUsing)]
+        public async Task TestPlaceUsingWithUsings_NotWithAliases()
+        {
+            await TestAsync(
+@"
+using System;
+
+namespace N
+{
+    using C = System.Collections;
+
+    class Class
+    {
+        [|List<int>|] Method()
+        {
+            Foo();
+        }
+    }
+}",
+@"
+using System;
+using System.Collections.Generic;
+
+namespace N
+{
+    using C = System.Collections;
+
+    class Class
+    {
+        List<int> Method()
+        {
+            Foo();
+        }
+    }
+}");
+        }
+
         public partial class AddUsingTestsWithAddImportDiagnosticProvider : AbstractCSharpDiagnosticProviderBasedUserDiagnosticTest
         {
             internal override Tuple<DiagnosticAnalyzer, CodeFixProvider> CreateDiagnosticProviderAndFixer(Workspace workspace)

src/Features/VisualBasic/Portable/CodeFixes/AddImport/VisualBasicAddImportCodeFixProvider.vb

@@ -313,7 +313,7 @@ Namespace Microsoft.CodeAnalysis.VisualBasic.CodeFixes.AddImport
             Return symbol IsNot Nothing AndAlso symbol.Locations.Length > 0
         End Function
 
-        Protected Overloads Overrides Async Function AddImportAsync(
+        Protected Overloads Overrides Function AddImportAsync(
                 contextNode As SyntaxNode,
                 symbol As INamespaceOrTypeSymbol,
                 document As Document,
@@ -322,9 +322,9 @@ Namespace Microsoft.CodeAnalysis.VisualBasic.CodeFixes.AddImport
 
             Dim nameSyntax = DirectCast(symbol.GenerateTypeSyntax(addGlobal:=False), NameSyntax)
 
-            Return Await AddImportsAsync(
+            Return AddImportsAsync(
                 contextNode, document, placeSystemNamespaceFirst, nameSyntax,
-                additionalAnnotation:=Nothing, cancellationToken:=cancellationToken).ConfigureAwait(False)
+                additionalAnnotation:=Nothing, cancellationToken:=cancellationToken)
         End Function
 
         Private Shared Async Function AddImportsAsync(

src/Workspaces/CSharp/Portable/AddImport/CSharpAddImportService.cs

@@ -2,13 +2,16 @@
 
 using System;
 using System.Collections.Generic;
+using System.Composition;
 using System.Linq;
 using Microsoft.CodeAnalysis.AddImport;
 using Microsoft.CodeAnalysis.CSharp.Extensions;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
+using Microsoft.CodeAnalysis.Host.Mef;
 
 namespace Microsoft.CodeAnalysis.CSharp.AddImport
 {
+    [ExportLanguageService(typeof(IAddImportService), LanguageNames.CSharp), Shared]
     internal class CSharpAddImportService : IAddImportService
     {
         public SyntaxNode AddImports(