Add headers and cleanup usings

src/Compatibility/Microsoft.DotNet.ApiCompatibility/Abstractions/CompatDifference.cs

@@ -1,4 +1,7 @@
-using Microsoft.CodeAnalysis;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.CodeAnalysis;
 using System;
 
 namespace Microsoft.DotNet.ApiCompatibility.Abstractions

src/Compatibility/Microsoft.DotNet.ApiCompatibility/Abstractions/DifferenceType.cs

@@ -1,4 +1,7 @@
-namespace Microsoft.DotNet.ApiCompatibility.Abstractions
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+namespace Microsoft.DotNet.ApiCompatibility.Abstractions
 {
     public enum DifferenceType
     {

src/Compatibility/Microsoft.DotNet.ApiCompatibility/Abstractions/Filtering/AccessibilityFilter.cs

@@ -1,4 +1,7 @@
-using Microsoft.CodeAnalysis;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.CodeAnalysis;
 
 namespace Microsoft.DotNet.ApiCompatibility.Abstractions
 {

src/Compatibility/Microsoft.DotNet.ApiCompatibility/Abstractions/Filtering/IDiffingFilter.cs

@@ -1,7 +1,7 @@
-using Microsoft.CodeAnalysis;
-using System;
-using System.Collections.Generic;
-using System.Text;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.CodeAnalysis;
 
 namespace Microsoft.DotNet.ApiCompatibility.Abstractions
 {

src/Compatibility/Microsoft.DotNet.ApiCompatibility/Abstractions/IDiagnostic.cs

@@ -1,4 +1,7 @@
-namespace Microsoft.DotNet.ApiCompatibility.Abstractions
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+namespace Microsoft.DotNet.ApiCompatibility.Abstractions
 {
     public interface IDiagnostic
     {

src/Compatibility/Microsoft.DotNet.ApiCompatibility/Abstractions/MapperVisitor.cs

@@ -1,4 +1,7 @@
-namespace Microsoft.DotNet.ApiCompatibility.Abstractions
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+namespace Microsoft.DotNet.ApiCompatibility.Abstractions
 {
     public class MapperVisitor
     {

src/Compatibility/Microsoft.DotNet.ApiCompatibility/Abstractions/Mappers/AssemblyMapper.cs

@@ -1,7 +1,8 @@
-using Microsoft.CodeAnalysis;
-using System;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.CodeAnalysis;
 using System.Collections.Generic;
-using System.Text;
 
 namespace Microsoft.DotNet.ApiCompatibility.Abstractions
 {

src/Compatibility/Microsoft.DotNet.ApiCompatibility/Abstractions/Mappers/AssemblySetMapper.cs

@@ -1,7 +1,7 @@
 using Microsoft.CodeAnalysis;
-using System;
 using System.Collections.Generic;
-using System.Text;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
 
 namespace Microsoft.DotNet.ApiCompatibility.Abstractions
 {

src/Compatibility/Microsoft.DotNet.ApiCompatibility/Abstractions/Mappers/ElementMapper.cs

@@ -1,7 +1,8 @@
-using Microsoft.DotNet.ApiCompatibility.Rules;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
 using System;
 using System.Collections.Generic;
-using System.Text;
 
 namespace Microsoft.DotNet.ApiCompatibility.Abstractions
 {

src/Compatibility/Microsoft.DotNet.ApiCompatibility/Abstractions/Mappers/MemberMapper.cs

@@ -1,7 +1,7 @@
-using Microsoft.CodeAnalysis;
-using System;
-using System.Collections.Generic;
-using System.Text;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.CodeAnalysis;
 
 namespace Microsoft.DotNet.ApiCompatibility.Abstractions
 {

src/Compatibility/Microsoft.DotNet.ApiCompatibility/Abstractions/Mappers/NamespaceMapper.cs

@@ -1,7 +1,9 @@
-using Microsoft.CodeAnalysis;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.CodeAnalysis;
 using System;
 using System.Collections.Generic;
-using System.Linq;
 
 namespace Microsoft.DotNet.ApiCompatibility.Abstractions
 {

src/Compatibility/Microsoft.DotNet.ApiCompatibility/Abstractions/Mappers/TypeMapper.cs

@@ -1,4 +1,7 @@
-using Microsoft.CodeAnalysis;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.CodeAnalysis;
 using System.Collections.Generic;
 
 namespace Microsoft.DotNet.ApiCompatibility.Abstractions

src/Compatibility/Microsoft.DotNet.ApiCompatibility/Abstractions/Rule.cs

@@ -1,7 +1,7 @@
-using Microsoft.CodeAnalysis;
-using System;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
 using System.Collections.Generic;
-using System.Text;
 
 namespace Microsoft.DotNet.ApiCompatibility.Abstractions
 {

src/Compatibility/Microsoft.DotNet.ApiCompatibility/ApiDiffer.cs

@@ -1,6 +1,8 @@
-using Microsoft.CodeAnalysis;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.CodeAnalysis;
 using Microsoft.DotNet.ApiCompatibility.Abstractions;
-using System;
 using System.Collections.Generic;
 
 namespace Microsoft.DotNet.ApiCompatibility

src/Compatibility/Microsoft.DotNet.ApiCompatibility/AssemblySymbolLoader.cs

@@ -1,4 +1,7 @@
-using Microsoft.CodeAnalysis;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp;
 using System;
 using System.Collections.Generic;

src/Compatibility/Microsoft.DotNet.ApiCompatibility/DefaultSymbolsEqualityComparer.cs

@@ -1,4 +1,7 @@
-using Microsoft.CodeAnalysis;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.CodeAnalysis;
 using System;
 using System.Collections.Generic;
 

src/Compatibility/Microsoft.DotNet.ApiCompatibility/DiagnosticBag.cs

@@ -1,6 +1,7 @@
-using Microsoft.CodeAnalysis;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
 using Microsoft.DotNet.ApiCompatibility.Abstractions;
-using System;
 using System.Collections.Generic;
 
 namespace Microsoft.DotNet.ApiCompatibility

src/Compatibility/Microsoft.DotNet.ApiCompatibility/DiagnosticIds.cs

@@ -1,4 +1,7 @@
-namespace Microsoft.DotNet.ApiCompatibility
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+namespace Microsoft.DotNet.ApiCompatibility
 {
     public static class DiagnosticIds
     {

src/Compatibility/Microsoft.DotNet.ApiCompatibility/DiferenceVisitor.cs

@@ -1,4 +1,7 @@
-using Microsoft.DotNet.ApiCompatibility.Abstractions;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.DotNet.ApiCompatibility.Abstractions;
 using System;
 using System.Collections.Generic;
 

src/Compatibility/Microsoft.DotNet.ApiCompatibility/DiffingSettings.cs

@@ -1,4 +1,7 @@
-using Microsoft.CodeAnalysis;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.CodeAnalysis;
 using Microsoft.DotNet.ApiCompatibility.Abstractions;
 using Microsoft.DotNet.ApiCompatibility.Rules;
 using System.Collections.Generic;

src/Compatibility/Microsoft.DotNet.ApiCompatibility/Extensions/TypeSymbolExtensions.cs

@@ -1,7 +1,8 @@
-using Microsoft.CodeAnalysis;
-using System;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.CodeAnalysis;
 using System.Collections.Generic;
-using System.Text;
 
 namespace Microsoft.DotNet.ApiCompatibility.Extensions
 {

src/Compatibility/Microsoft.DotNet.ApiCompatibility/Rules/MembersMustExist.cs

@@ -1,9 +1,10 @@
-using Microsoft.CodeAnalysis;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.CodeAnalysis;
 using Microsoft.DotNet.ApiCompatibility.Abstractions;
 using Microsoft.DotNet.ApiCompatibility.Extensions;
-using System;
 using System.Collections.Generic;
-using System.Text;
 
 namespace Microsoft.DotNet.ApiCompatibility.Rules
 {

src/Compatibility/Microsoft.DotNet.ApiCompatibility/Rules/RuleDriver.cs

@@ -1,4 +1,6 @@
-using Microsoft.CodeAnalysis;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.s
+
 using Microsoft.DotNet.ApiCompatibility.Abstractions;
 using System;
 using System.Collections.Generic;

src/Tests/Microsoft.DotNet.ApiCompatibility.Tests/AssemblySymbolLoaderTests.cs

@@ -1,14 +1,12 @@
 // Copyright (c) .NET Foundation and contributors. All rights reserved.
 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
-//
 
 using System;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Threading;
-using System.Xml.Linq;
 using Microsoft.CodeAnalysis;
 using Microsoft.DotNet.Cli.Utils;
 using Microsoft.NET.TestFramework;

src/Tests/Microsoft.DotNet.ApiCompatibility.Tests/Rules/MembersMustExistTests.cs

@@ -1,4 +1,7 @@
-using Microsoft.CodeAnalysis;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.CodeAnalysis;
 using Microsoft.DotNet.ApiCompatibility.Abstractions;
 using System.Collections.Generic;
 using Xunit;

src/Tests/Microsoft.DotNet.ApiCompatibility.Tests/Rules/TypeMustExistTests.cs

@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
 using Microsoft.CodeAnalysis;
 using Microsoft.DotNet.ApiCompatibility.Abstractions;
 using System.Collections.Generic;

src/Tests/Microsoft.DotNet.ApiCompatibility.Tests/SymbolFactory.cs

@@ -1,4 +1,7 @@
-using Microsoft.CodeAnalysis;
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp;
 using System.Collections.Generic;
 using System.Linq;