Add attributes to code fixes.

Author: JohanLarsson

AspNetCoreAnalyzers/CodeFixes/ParameterNameFix.cs

@@ -1,14 +1,18 @@
 namespace AspNetCoreAnalyzers
 {
     using System.Collections.Immutable;
+    using System.Composition;
     using System.Threading.Tasks;
     using Gu.Roslyn.AnalyzerExtensions;
     using Gu.Roslyn.CodeFixExtensions;
+    using Microsoft.CodeAnalysis;
     using Microsoft.CodeAnalysis.CodeActions;
     using Microsoft.CodeAnalysis.CodeFixes;
     using Microsoft.CodeAnalysis.CSharp.Syntax;
     using Microsoft.CodeAnalysis.Rename;
 
+    [ExportCodeFixProvider(LanguageNames.CSharp, Name = nameof(ParameterNameFix))]
+    [Shared]
     public class ParameterNameFix : CodeFixProvider
     {
         public override ImmutableArray<string> FixableDiagnosticIds { get; } = ImmutableArray.Create(

AspNetCoreAnalyzers/CodeFixes/ParameterSyntaxFix.cs

@@ -1,6 +1,7 @@
 namespace AspNetCoreAnalyzers
 {
     using System.Collections.Immutable;
+    using System.Composition;
     using System.Threading;
     using System.Threading.Tasks;
     using Gu.Roslyn.CodeFixExtensions;
@@ -9,12 +10,16 @@ namespace AspNetCoreAnalyzers
     using Microsoft.CodeAnalysis.CodeFixes;
     using Microsoft.CodeAnalysis.CSharp.Syntax;
 
+    [ExportCodeFixProvider(LanguageNames.CSharp, Name = nameof(ParameterSyntaxFix))]
+    [Shared]
     public class ParameterSyntaxFix : CodeFixProvider
     {
         public override ImmutableArray<string> FixableDiagnosticIds { get; } = ImmutableArray.Create(
             ASP004ParameterSyntax.DiagnosticId,
             ASP005ParameterRegex.DiagnosticId);
 
+        public override FixAllProvider GetFixAllProvider() => null;
+
         public override async Task RegisterCodeFixesAsync(CodeFixContext context)
         {
             var syntaxRoot = await context.Document.GetSyntaxRootAsync(context.CancellationToken)

AspNetCoreAnalyzers/CodeFixes/ParameterTypeFix.cs

@@ -1,12 +1,16 @@
 namespace AspNetCoreAnalyzers
 {
     using System.Collections.Immutable;
+    using System.Composition;
     using System.Threading.Tasks;
     using Gu.Roslyn.CodeFixExtensions;
     using Microsoft.CodeAnalysis;
+    using Microsoft.CodeAnalysis.CodeFixes;
     using Microsoft.CodeAnalysis.CSharp;
     using Microsoft.CodeAnalysis.CSharp.Syntax;
 
+    [ExportCodeFixProvider(LanguageNames.CSharp, Name = nameof(ParameterTypeFix))]
+    [Shared]
     public class ParameterTypeFix : DocumentEditorCodeFixProvider
     {
         public override ImmutableArray<string> FixableDiagnosticIds { get; } = ImmutableArray.Create(