Merge pull request #47961 from jaredpar/nullable

Enable nullability by default in Roslyn
dotnet · Sep 29, 2020 · cf55f3a · cf55f3a
2 parents bbe2419 + 1234f61
commit cf55f3a
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diff --git a/eng/targets/Settings.props b/eng/targets/Settings.props
@@ -46,6 +46,8 @@
         https://github.com/dotnet/wpf/issues/1718
     -->
     <EmbedUntrackedSources>false</EmbedUntrackedSources>
+
+    <Nullable>enable</Nullable>
   </PropertyGroup>
 
   <!-- 

diff --git a/.../Analyzers/AddAccessibilityModifiers/CSharpAddAccessibilityModifiersDiagnosticAnalyzer.cs b/.../Analyzers/AddAccessibilityModifiers/CSharpAddAccessibilityModifiersDiagnosticAnalyzer.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using System.Collections.Immutable;
 using Microsoft.CodeAnalysis.AddAccessibilityModifiers;
 using Microsoft.CodeAnalysis.CodeStyle;

diff --git a/src/Analyzers/CSharp/Analyzers/AddBraces/CSharpAddBracesDiagnosticAnalyzer.cs b/src/Analyzers/CSharp/Analyzers/AddBraces/CSharpAddBracesDiagnosticAnalyzer.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using System.Diagnostics;
 using System.Threading;
 using Microsoft.CodeAnalysis.CodeStyle;

diff --git a/...lyzers/AddRequiredParentheses/CSharpAddRequiredExpressionParenthesesDiagnosticAnalyzer.cs b/...lyzers/AddRequiredParentheses/CSharpAddRequiredExpressionParenthesesDiagnosticAnalyzer.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable enable
-
 using System.Collections.Immutable;
 using System.Diagnostics;
 using Microsoft.CodeAnalysis.AddRequiredParentheses;

diff --git a/...Analyzers/AddRequiredParentheses/CSharpAddRequiredPatternParenthesesDiagnosticAnalyzer.cs b/...Analyzers/AddRequiredParentheses/CSharpAddRequiredPatternParenthesesDiagnosticAnalyzer.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable enable
-
 using System.Collections.Immutable;
 using System.Diagnostics;
 using Microsoft.CodeAnalysis.AddRequiredParentheses;

diff --git a/...lyzers/ConvertAnonymousTypeToTuple/CSharpConvertAnonymousTypeToTupleDiagnosticAnalyzer.cs b/...lyzers/ConvertAnonymousTypeToTuple/CSharpConvertAnonymousTypeToTupleDiagnosticAnalyzer.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable enable
-
 using Microsoft.CodeAnalysis.ConvertAnonymousTypeToTuple;
 using Microsoft.CodeAnalysis.CSharp.LanguageServices;
 using Microsoft.CodeAnalysis.CSharp.Syntax;

diff --git a/...alyzers/ConvertSwitchStatementToExpression/ConvertSwitchStatementToExpressionConstants.cs b/...alyzers/ConvertSwitchStatementToExpression/ConvertSwitchStatementToExpressionConstants.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 namespace Microsoft.CodeAnalysis.CSharp.ConvertSwitchStatementToExpression
 {
     internal static class ConvertSwitchStatementToExpressionConstants

diff --git a/...tchStatementToExpression/ConvertSwitchStatementToExpressionDiagnosticAnalyzer.Analyzer.cs b/...tchStatementToExpression/ConvertSwitchStatementToExpressionDiagnosticAnalyzer.Analyzer.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using System;
 using System.Diagnostics;
 using System.Linq;

diff --git a/...onvertSwitchStatementToExpression/ConvertSwitchStatementToExpressionDiagnosticAnalyzer.cs b/...onvertSwitchStatementToExpression/ConvertSwitchStatementToExpressionDiagnosticAnalyzer.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using System.Collections.Immutable;
 using System.Globalization;
 using System.Linq;

diff --git a/...Analyzers/ConvertSwitchStatementToExpression/ConvertSwitchStatementToExpressionHelpers.cs b/...Analyzers/ConvertSwitchStatementToExpression/ConvertSwitchStatementToExpressionHelpers.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using Microsoft.CodeAnalysis.CSharp.Extensions;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 

diff --git a/...s/CSharp/Analyzers/ConvertTypeofToNameof/CSharpConvertTypeOfToNameOfDiagnosticAnalyzer.cs b/...s/CSharp/Analyzers/ConvertTypeofToNameof/CSharpConvertTypeOfToNameOfDiagnosticAnalyzer.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable enable
-
 using Microsoft.CodeAnalysis.ConvertTypeOfToNameOf;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Microsoft.CodeAnalysis.Diagnostics;

diff --git a/src/Analyzers/CSharp/Analyzers/FileHeaders/CSharpFileHeaderDiagnosticAnalyzer.cs b/src/Analyzers/CSharp/Analyzers/FileHeaders/CSharpFileHeaderDiagnosticAnalyzer.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable enable
-
 using Microsoft.CodeAnalysis.Diagnostics;
 using Microsoft.CodeAnalysis.FileHeaders;
 

diff --git a/src/Analyzers/CSharp/Analyzers/FileHeaders/CSharpFileHeaderHelper.cs b/src/Analyzers/CSharp/Analyzers/FileHeaders/CSharpFileHeaderHelper.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable enable
-
 using System;
 using Microsoft.CodeAnalysis.CSharp.LanguageServices;
 using Microsoft.CodeAnalysis.FileHeaders;

diff --git a/...Analyzers/CSharp/Analyzers/InlineDeclaration/CSharpInlineDeclarationDiagnosticAnalyzer.cs b/...Analyzers/CSharp/Analyzers/InlineDeclaration/CSharpInlineDeclarationDiagnosticAnalyzer.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using System.Collections.Immutable;
 using System.Linq;
 using System.Linq.Expressions;

diff --git a/...lyzers/InvokeDelegateWithConditionalAccess/InvokeDelegateWithConditionalAccessAnalyzer.cs b/...lyzers/InvokeDelegateWithConditionalAccess/InvokeDelegateWithConditionalAccessAnalyzer.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using System.Collections.Immutable;
 using Microsoft.CodeAnalysis.CodeStyle;
 using Microsoft.CodeAnalysis.CSharp.CodeStyle;

diff --git a/...ers/CSharp/Analyzers/MakeLocalFunctionStatic/MakeLocalFunctionStaticDiagnosticAnalyzer.cs b/...ers/CSharp/Analyzers/MakeLocalFunctionStatic/MakeLocalFunctionStaticDiagnosticAnalyzer.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using System.Collections.Immutable;
 using Microsoft.CodeAnalysis.CodeStyle;
 using Microsoft.CodeAnalysis.CSharp.CodeStyle;

diff --git a/src/Analyzers/CSharp/Analyzers/MakeLocalFunctionStatic/MakeLocalFunctionStaticHelper.cs b/src/Analyzers/CSharp/Analyzers/MakeLocalFunctionStatic/MakeLocalFunctionStaticHelper.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable enable
-
 using System.Collections.Immutable;
 using System.Diagnostics.CodeAnalysis;
 using System.Linq;

diff --git a/...rp/Analyzers/MakeStructFieldsWritable/CSharpMakeStructFieldsWritableDiagnosticAnalyzer.cs b/...rp/Analyzers/MakeStructFieldsWritable/CSharpMakeStructFieldsWritableDiagnosticAnalyzer.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using System.Collections.Immutable;
 using System.Linq;
 using System.Threading;

diff --git a/...s/CSharp/Analyzers/MisplacedUsingDirectives/MisplacedUsingDirectivesDiagnosticAnalyzer.cs b/...s/CSharp/Analyzers/MisplacedUsingDirectives/MisplacedUsingDirectivesDiagnosticAnalyzer.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Linq;

diff --git a/src/Analyzers/CSharp/Analyzers/NamingStyle/CSharpNamingStyleDiagnosticAnalyzer.cs b/src/Analyzers/CSharp/Analyzers/NamingStyle/CSharpNamingStyleDiagnosticAnalyzer.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable enable
-
 using System.Collections.Immutable;
 using System.Linq;
 using Microsoft.CodeAnalysis.CSharp.Syntax;

diff --git a/src/Analyzers/CSharp/Analyzers/OrderModifiers/CSharpOrderModifiersDiagnosticAnalyzer.cs b/src/Analyzers/CSharp/Analyzers/OrderModifiers/CSharpOrderModifiersDiagnosticAnalyzer.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using System.Collections.Generic;
 using Microsoft.CodeAnalysis.CSharp.CodeStyle;
 using Microsoft.CodeAnalysis.CSharp.LanguageServices;

diff --git a/src/Analyzers/CSharp/Analyzers/OrderModifiers/CSharpOrderModifiersHelper.cs b/src/Analyzers/CSharp/Analyzers/OrderModifiers/CSharpOrderModifiersHelper.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using System.Collections.Generic;
 using Microsoft.CodeAnalysis.OrderModifiers;
 

diff --git a/...yzers/CSharp/Analyzers/PopulateSwitch/CSharpPopulateSwitchExpressionDiagnosticAnalyzer.cs b/...yzers/CSharp/Analyzers/PopulateSwitch/CSharpPopulateSwitchExpressionDiagnosticAnalyzer.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable enable
-
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Microsoft.CodeAnalysis.Diagnostics;
 using Microsoft.CodeAnalysis.PopulateSwitch;

diff --git a/...lyzers/CSharp/Analyzers/PopulateSwitch/CSharpPopulateSwitchStatementDiagnosticAnalyzer.cs b/...lyzers/CSharp/Analyzers/PopulateSwitch/CSharpPopulateSwitchStatementDiagnosticAnalyzer.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable enable
-
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Microsoft.CodeAnalysis.Diagnostics;
 using Microsoft.CodeAnalysis.PopulateSwitch;

diff --git a/...yzers/CSharp/Analyzers/QualifyMemberAccess/CSharpQualifyMemberAccessDiagnosticAnalyzer.cs b/...yzers/CSharp/Analyzers/QualifyMemberAccess/CSharpQualifyMemberAccessDiagnosticAnalyzer.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using System.Linq;
 using Microsoft.CodeAnalysis.CSharp.Extensions;
 using Microsoft.CodeAnalysis.CSharp.Syntax;

diff --git a/...nalyzers/RemoveConfusingSuppression/CSharpRemoveConfusingSuppressionDiagnosticAnalyzer.cs b/...nalyzers/RemoveConfusingSuppression/CSharpRemoveConfusingSuppressionDiagnosticAnalyzer.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable enable
-
 using System.Collections.Immutable;
 using Microsoft.CodeAnalysis.CodeStyle;
 using Microsoft.CodeAnalysis.CSharp.Syntax;

diff --git a/...s/CSharp/Analyzers/RemoveUnnecessaryCast/CSharpRemoveUnnecessaryCastDiagnosticAnalyzer.cs b/...s/CSharp/Analyzers/RemoveUnnecessaryCast/CSharpRemoveUnnecessaryCastDiagnosticAnalyzer.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable enable
-
 using System.Collections.Immutable;
 using System.Threading;
 using Microsoft.CodeAnalysis.CSharp.Simplification.Simplifiers;

diff --git a/...rp/Analyzers/RemoveUnnecessaryImports/CSharpRemoveUnnecessaryImportsDiagnosticAnalyzer.cs b/...rp/Analyzers/RemoveUnnecessaryImports/CSharpRemoveUnnecessaryImportsDiagnosticAnalyzer.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Linq;

diff --git a/...eUnnecessaryParentheses/CSharpRemoveUnnecessaryExpressionParenthesesDiagnosticAnalyzer.cs b/...eUnnecessaryParentheses/CSharpRemoveUnnecessaryExpressionParenthesesDiagnosticAnalyzer.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable enable
-
 using Microsoft.CodeAnalysis.CSharp.Extensions;
 using Microsoft.CodeAnalysis.CSharp.LanguageServices;
 using Microsoft.CodeAnalysis.CSharp.Precedence;

diff --git a/...moveUnnecessaryParentheses/CSharpRemoveUnnecessaryPatternParenthesesDiagnosticAnalyzer.cs b/...moveUnnecessaryParentheses/CSharpRemoveUnnecessaryPatternParenthesesDiagnosticAnalyzer.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable enable
-
 using Microsoft.CodeAnalysis.CSharp.Extensions;
 using Microsoft.CodeAnalysis.CSharp.LanguageServices;
 using Microsoft.CodeAnalysis.CSharp.Precedence;

diff --git a/...UnnecessarySuppressions/CSharpRemoveUnnecessaryAttributeSuppressionsDiagnosticAnalyzer.cs b/...UnnecessarySuppressions/CSharpRemoveUnnecessaryAttributeSuppressionsDiagnosticAnalyzer.cs
@@ -5,9 +5,6 @@
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Microsoft.CodeAnalysis.Diagnostics;
 using Microsoft.CodeAnalysis.RemoveUnnecessarySuppressions;
-
-#nullable enable
-
 namespace Microsoft.CodeAnalysis.CSharp.RemoveUnnecessarySuppressions
 {
     [DiagnosticAnalyzer(LanguageNames.CSharp)]

diff --git a/...oveUnnecessarySuppressions/CSharpRemoveUnnecessaryPragmaSuppressionsDiagnosticAnalyzer.cs b/...oveUnnecessarySuppressions/CSharpRemoveUnnecessaryPragmaSuppressionsDiagnosticAnalyzer.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable enable
-
 using System.Reflection;
 using Microsoft.CodeAnalysis.CSharp.LanguageServices;
 using Microsoft.CodeAnalysis.Diagnostics;

diff --git a/...s/CSharp/Analyzers/RemoveUnreachableCode/CSharpRemoveUnreachableCodeDiagnosticAnalyzer.cs b/...s/CSharp/Analyzers/RemoveUnreachableCode/CSharpRemoveUnreachableCodeDiagnosticAnalyzer.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using System.Collections.Immutable;
 using System.Linq;
 using Microsoft.CodeAnalysis.CodeStyle;

diff --git a/src/Analyzers/CSharp/Analyzers/RemoveUnreachableCode/RemoveUnreachableCodeHelpers.cs b/src/Analyzers/CSharp/Analyzers/RemoveUnreachableCode/RemoveUnreachableCodeHelpers.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using System.Collections.Immutable;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Microsoft.CodeAnalysis.PooledObjects;

diff --git a/...yzers/CSharp/Analyzers/RemoveUnusedMembers/CSharpRemoveUnusedMembersDiagnosticAnalyzer.cs b/...yzers/CSharp/Analyzers/RemoveUnusedMembers/CSharpRemoveUnusedMembersDiagnosticAnalyzer.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Microsoft.CodeAnalysis.Diagnostics;
 using Microsoft.CodeAnalysis.RemoveUnusedMembers;

diff --git a/...emoveUnusedParametersAndValues/CSharpRemoveUnusedParametersAndValuesDiagnosticAnalyzer.cs b/...emoveUnusedParametersAndValues/CSharpRemoveUnusedParametersAndValuesDiagnosticAnalyzer.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using Microsoft.CodeAnalysis.CSharp.CodeStyle;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Microsoft.CodeAnalysis.Diagnostics;

diff --git a/...CSharp/Analyzers/SimplifyBooleanExpression/CSharpSimplifyConditionalDiagnosticAnalyzer.cs b/...CSharp/Analyzers/SimplifyBooleanExpression/CSharpSimplifyConditionalDiagnosticAnalyzer.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using System.Threading;
 using Microsoft.CodeAnalysis.CSharp.LanguageServices;
 using Microsoft.CodeAnalysis.CSharp.Syntax;

diff --git a/...s/CSharp/Analyzers/SimplifyInterpolation/CSharpSimplifyInterpolationDiagnosticAnalyzer.cs b/...s/CSharp/Analyzers/SimplifyInterpolation/CSharpSimplifyInterpolationDiagnosticAnalyzer.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using Microsoft.CodeAnalysis.CSharp.EmbeddedLanguages.VirtualChars;
 using Microsoft.CodeAnalysis.CSharp.LanguageServices;
 using Microsoft.CodeAnalysis.CSharp.Syntax;

diff --git a/src/Analyzers/CSharp/Analyzers/UseAutoProperty/CSharpUseAutoPropertyAnalyzer.cs b/src/Analyzers/CSharp/Analyzers/UseAutoProperty/CSharpUseAutoPropertyAnalyzer.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable enable
-
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading;

diff --git a/...s/CSharp/Analyzers/UseCoalesceExpression/CSharpUseCoalesceExpressionDiagnosticAnalyzer.cs b/...s/CSharp/Analyzers/UseCoalesceExpression/CSharpUseCoalesceExpressionDiagnosticAnalyzer.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable enable
-
 using Microsoft.CodeAnalysis.CSharp.LanguageServices;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Microsoft.CodeAnalysis.Diagnostics;

diff --git a/...alyzers/UseCoalesceExpression/CSharpUseCoalesceExpressionForNullableDiagnosticAnalyzer.cs b/...alyzers/UseCoalesceExpression/CSharpUseCoalesceExpressionForNullableDiagnosticAnalyzer.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable enable
-
 using Microsoft.CodeAnalysis.CSharp.LanguageServices;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Microsoft.CodeAnalysis.Diagnostics;

diff --git a/...rp/Analyzers/UseCollectionInitializer/CSharpUseCollectionInitializerDiagnosticAnalyzer.cs b/...rp/Analyzers/UseCollectionInitializer/CSharpUseCollectionInitializerDiagnosticAnalyzer.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable enable
-
 using Microsoft.CodeAnalysis.CSharp.LanguageServices;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Microsoft.CodeAnalysis.Diagnostics;

diff --git a/...s/CSharp/Analyzers/UseCompoundAssignment/CSharpUseCompoundAssignmentDiagnosticAnalyzer.cs b/...s/CSharp/Analyzers/UseCompoundAssignment/CSharpUseCompoundAssignmentDiagnosticAnalyzer.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable enable
-
 using Microsoft.CodeAnalysis.CSharp.LanguageServices;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Microsoft.CodeAnalysis.Diagnostics;

diff --git a/.../Analyzers/UseCompoundAssignment/CSharpUseCompoundCoalesceAssignmentDiagnosticAnalyzer.cs b/.../Analyzers/UseCompoundAssignment/CSharpUseCompoundCoalesceAssignmentDiagnosticAnalyzer.cs
@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#nullable disable
+
 using System.Collections.Immutable;
 using Microsoft.CodeAnalysis.CodeStyle;
 using Microsoft.CodeAnalysis.CSharp.LanguageServices;