1 files changed, 58 insertions, 0 deletions
diff --git a/main/src/addins/CSharpBinding/MonoDevelop.CSharp.CodeFixes/RemoveUnnecessaryUsings/RemoveUnnecessaryUsingsCodeFixProvider.cs b/main/src/addins/CSharpBinding/MonoDevelop.CSharp.CodeFixes/RemoveUnnecessaryUsings/RemoveUnnecessaryUsingsCodeFixProvider.cs
new file mode 100644
index 0000000000..d7cb42e0d2
--- /dev/null
+++ b/main/src/addins/CSharpBinding/MonoDevelop.CSharp.CodeFixes/RemoveUnnecessaryUsings/RemoveUnnecessaryUsingsCodeFixProvider.cs
@@ -0,0 +1,58 @@
+// 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;
+using System.Collections.Immutable;
+using System.Composition;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.CodeAnalysis.CodeActions;
+using Microsoft.CodeAnalysis.CodeFixes;
+using Microsoft.CodeAnalysis.Shared.Extensions;
+using Microsoft.CodeAnalysis;
+using ICSharpCode.NRefactory6.CSharp.Features.RemoveUnnecessaryImports;
+using MonoDevelop.Core;
+using ICSharpCode.NRefactory6.CSharp.Refactoring;
+using Microsoft.CodeAnalysis.Text;
+using MonoDevelop.CSharp.Diagnostics;
+
+namespace MonoDevelop.CSharp.CodeFixes.RemoveUnusedUsings
+{
+	[ExportCodeFixProvider(LanguageNames.CSharp, Name = PredefinedCodeFixProviderNames.RemoveUnnecessaryImports), Shared]
+	[ExtensionOrder(After = PredefinedCodeFixProviderNames.AddMissingReference)]
+	internal class RemoveUnnecessaryUsingsCodeFixProvider : CodeFixProvider
+	{
+		public sealed override ImmutableArray<string> FixableDiagnosticIds
+		{
+			get { return ImmutableArray.Create(IDEDiagnosticIds.RemoveUnnecessaryImportsDiagnosticId); }
+		}
+
+		public sealed override FixAllProvider GetFixAllProvider()
+		{
+			return WellKnownFixAllProviders.BatchFixer;
+		}
+
+		static readonly CSharpRemoveUnnecessaryImportsService service = new CSharpRemoveUnnecessaryImportsService();
+
+		public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
+		{
+			var document = context.Document;
+			var span = context.Span;
+			var cancellationToken = context.CancellationToken;
+
+			var model = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
+			var root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
+			var newDocument = service.RemoveUnnecessaryImports(document, model, root, cancellationToken);
+			if (newDocument == document || newDocument == null)
+			{
+				return;
+			}
+
+			context.RegisterCodeFix(
+				new DocumentChangeAction(context.Diagnostics[0].Location.SourceSpan, DiagnosticSeverity.Warning,
+					GettextCatalog.GetString ("Remove Unnecessary Usings"),
+					(c) => Task.FromResult(newDocument)),
+				context.Diagnostics);
+		}
+
+	}
+}