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src/Features/CSharp/Portable/UseDeconstruction/CSharpUseDeconstructionCodeFixProvider.cs

@@ -20,8 +20,6 @@ namespace Microsoft.CodeAnalysis.CSharp.UseDeconstruction
     [ExportCodeFixProvider(LanguageNames.CSharp), Shared]
     internal class CSharpUseDeconstructionCodeFixProvider : SyntaxEditorBasedCodeFixProvider
     {
-        private readonly CSharpUseDeconstructionDiagnosticAnalyzer s_analyzer = new CSharpUseDeconstructionDiagnosticAnalyzer();
-
         public override ImmutableArray<string> FixableDiagnosticIds
             => ImmutableArray.Create(IDEDiagnosticIds.UseDeconstructionDiagnosticId);
 
@@ -65,7 +63,7 @@ private SyntaxNode UpdateRoot(SemanticModel semanticModel, SyntaxNode root, Synt
             if (node is VariableDeclaratorSyntax variableDeclarator)
             {
                 var variableDeclaration = (VariableDeclarationSyntax)variableDeclarator.Parent;
-                if (s_analyzer.TryAnalyzeVariableDeclaration(
+                if (CSharpUseDeconstructionDiagnosticAnalyzer.TryAnalyzeVariableDeclaration(
                         semanticModel, variableDeclaration,
                         out var tupleType, out memberAccessExpressions,
                         cancellationToken))
@@ -81,7 +79,7 @@ private SyntaxNode UpdateRoot(SemanticModel semanticModel, SyntaxNode root, Synt
             }
             else if (node is ForEachStatementSyntax forEachStatement)
             {
-                if (s_analyzer.TryAnalyzeForEachStatement(
+                if (CSharpUseDeconstructionDiagnosticAnalyzer.TryAnalyzeForEachStatement(
                         semanticModel, forEachStatement,
                         out var tupleType, out memberAccessExpressions,
                         cancellationToken))

src/Features/CSharp/Portable/UseDeconstruction/CSharpUseDeconstructionDiagnosticAnalyzer.cs

@@ -67,7 +67,7 @@ private void AnalyzeNode(SyntaxNodeAnalysisContext context)
         private void AnalyzeVariableDeclaration(
             SyntaxNodeAnalysisContext context, VariableDeclarationSyntax variableDeclaration, DiagnosticSeverity severity)
         {
-            if (!this.TryAnalyzeVariableDeclaration(
+            if (!TryAnalyzeVariableDeclaration(
                     context.SemanticModel, variableDeclaration, out _,
                     out var memberAccessExpressions, context.CancellationToken))
             {
@@ -82,7 +82,7 @@ private void AnalyzeNode(SyntaxNodeAnalysisContext context)
         private void AnalyzeForEachStatement(
             SyntaxNodeAnalysisContext context, ForEachStatementSyntax forEachStatement, DiagnosticSeverity severity)
         {
-            if (!this.TryAnalyzeForEachStatement(
+            if (!TryAnalyzeForEachStatement(
                     context.SemanticModel, forEachStatement, out _,
                     out var memberAccessExpressions, context.CancellationToken))
             {
@@ -94,7 +94,7 @@ private void AnalyzeNode(SyntaxNodeAnalysisContext context)
                 forEachStatement.Identifier.GetLocation()));
         }
 
-        public bool TryAnalyzeVariableDeclaration(
+        public static bool TryAnalyzeVariableDeclaration(
             SemanticModel semanticModel,
             VariableDeclarationSyntax variableDeclaration,
             out INamedTypeSymbol tupleType,
@@ -132,7 +132,7 @@ private void AnalyzeNode(SyntaxNodeAnalysisContext context)
                 out tupleType, out memberAccessExpressions, cancellationToken);
         }
 
-        public bool TryAnalyzeForEachStatement(
+        public static bool TryAnalyzeForEachStatement(
             SemanticModel semanticModel,
             ForEachStatementSyntax forEachStatement, 
             out INamedTypeSymbol tupleType,
@@ -146,7 +146,7 @@ private void AnalyzeNode(SyntaxNodeAnalysisContext context)
                 forEachStatement, out tupleType, out memberAccessExpressions, cancellationToken);
         }
 
-        private bool TryAnalyze(
+        private static bool TryAnalyze(
             SemanticModel semanticModel,
             ILocalSymbol local,
             TypeSyntax typeNode,
@@ -220,7 +220,7 @@ private void AnalyzeNode(SyntaxNodeAnalysisContext context)
             }
         }
 
-        private bool AnyTupleFieldNamesCollideWithExistingNames(
+        private static bool AnyTupleFieldNamesCollideWithExistingNames(
             SemanticModel semanticModel, INamedTypeSymbol tupleType,
             SyntaxNode container, CancellationToken cancellationToken)
         {
@@ -242,7 +242,7 @@ private void AnalyzeNode(SyntaxNodeAnalysisContext context)
             return false;
         }
 
-        private bool IsViableTupleTypeSyntax(TypeSyntax type)
+        private static bool IsViableTupleTypeSyntax(TypeSyntax type)
         {
             if (type.IsVar)
             {
@@ -270,7 +270,7 @@ private bool IsViableTupleTypeSyntax(TypeSyntax type)
             return false;
         }
 
-        private bool OnlyUsedToAccessTupleFields(
+        private static bool OnlyUsedToAccessTupleFields(
             SemanticModel semanticModel, SyntaxNode searchScope, ILocalSymbol local,
             ArrayBuilder<MemberAccessExpressionSyntax> memberAccessLocations, CancellationToken cancellationToken)
         {