C# SyntaxGenerator.MethodDeclaration方法代码示例

        private static async Task<Document> Fix(CodeFixContext context, SyntaxNode root, SyntaxGenerator generator, SemanticModel semanticModel, CancellationToken cancellationToken)
        {
            SyntaxNode node = root.FindNode(context.Span);
            Diagnostic diagnostic = context.Diagnostics.First();
            switch (diagnostic.Properties[OperatorOverloadsHaveNamedAlternatesAnalyzer.DiagnosticKindText])
            {
                case OperatorOverloadsHaveNamedAlternatesAnalyzer.AddAlternateText:
                    SyntaxNode methodDeclaration = generator.GetDeclaration(node, DeclarationKind.Operator) ?? generator.GetDeclaration(node, DeclarationKind.ConversionOperator);
                    var operatorOverloadSymbol = (IMethodSymbol)semanticModel.GetDeclaredSymbol(methodDeclaration, cancellationToken);
                    INamedTypeSymbol typeSymbol = operatorOverloadSymbol.ContainingType;

                    // For C# the following `typeDeclarationSyntax` and `typeDeclaration` nodes are identical, but for VB they're different so in
                    // an effort to keep this as language-agnostic as possible, the heavy-handed approach is used.
                    SyntaxNode typeDeclarationSyntax = typeSymbol.DeclaringSyntaxReferences.First().GetSyntax(cancellationToken);
                    SyntaxNode typeDeclaration = generator.GetDeclaration(typeDeclarationSyntax, DeclarationKind.Class);

                    SyntaxNode addedMember;
                    ImmutableArray<SyntaxNode> bodyStatements = ImmutableArray.Create(
                        generator.ThrowStatement(generator.ObjectCreationExpression(semanticModel.Compilation.GetTypeByMetadataName("System.NotImplementedException"))));
                    if (OperatorOverloadsHaveNamedAlternatesAnalyzer.IsPropertyExpected(operatorOverloadSymbol.Name))
                    {
                        // add a property
                        addedMember = generator.PropertyDeclaration(
                            name: OperatorOverloadsHaveNamedAlternatesAnalyzer.IsTrueText,
                            type: generator.TypeExpression(SpecialType.System_Boolean),
                            accessibility: Accessibility.Public,
                            modifiers: DeclarationModifiers.ReadOnly,
                            getAccessorStatements: bodyStatements);
                    }
                    else
                    {
                        // add a method
                        ExpectedMethodSignature expectedSignature = GetExpectedMethodSignature(operatorOverloadSymbol, semanticModel.Compilation);
                        addedMember = generator.MethodDeclaration(
                            name: expectedSignature.Name,
                            parameters: expectedSignature.Parameters.Select(p => generator.ParameterDeclaration(p.Item1, generator.TypeExpression(p.Item2))),
                            returnType: generator.TypeExpression(expectedSignature.ReturnType),
                            accessibility: Accessibility.Public,
                            modifiers: expectedSignature.IsStatic ? DeclarationModifiers.Static : DeclarationModifiers.None,
                            statements: bodyStatements);
                    }

                    SyntaxNode newTypeDeclaration = generator.AddMembers(typeDeclaration, addedMember);
                    return context.Document.WithSyntaxRoot(root.ReplaceNode(typeDeclaration, newTypeDeclaration));
                case OperatorOverloadsHaveNamedAlternatesAnalyzer.FixVisibilityText:
                    SyntaxNode badVisibilityNode = generator.GetDeclaration(node, DeclarationKind.Method) ?? generator.GetDeclaration(node, DeclarationKind.Property);
                    ISymbol badVisibilitySymbol = semanticModel.GetDeclaredSymbol(badVisibilityNode, cancellationToken);
                    SymbolEditor symbolEditor = SymbolEditor.Create(context.Document);
                    ISymbol newSymbol = await symbolEditor.EditOneDeclarationAsync(badVisibilitySymbol,
                        (documentEditor, syntaxNode) => documentEditor.SetAccessibility(badVisibilityNode, Accessibility.Public)).ConfigureAwait(false);
                    Document newDocument = symbolEditor.GetChangedDocuments().Single();
                    SyntaxNode newRoot = await newDocument.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
                    return context.Document.WithSyntaxRoot(newRoot);
                default:
                    return context.Document;
            }
        }

            internal static SyntaxNode CreateAnalysisMethod(SyntaxGenerator generator, string methodName, SemanticModel semanticModel)
            {
                var type = SyntaxFactory.ParseTypeName("SyntaxNodeAnalysisContext");
                var parameters = new[] { generator.ParameterDeclaration("context", type) };
                SyntaxList<SyntaxNode> statements = new SyntaxList<SyntaxNode>();
                INamedTypeSymbol notImplementedException = semanticModel.Compilation.GetTypeByMetadataName("System.NotImplementedException");
                statements = statements.Add(generator.ThrowStatement(generator.ObjectCreationExpression(notImplementedException)));

                SyntaxNode newMethodDeclaration = generator.MethodDeclaration(methodName, parameters: parameters, accessibility: Accessibility.Private, statements: statements);
                return newMethodDeclaration.WithLeadingTrivia(SyntaxFactory.ParseLeadingTrivia("// This method, which is the method that is registered within Initialize, performs the analysis of the Syntax Tree when an IfStatementSyntax Node is found. If the analysis finds an error, a diagnostic is reported").ElementAt(0), SyntaxFactory.CarriageReturnLineFeed, SyntaxFactory.ParseLeadingTrivia("// In this tutorial, this method will walk through the Syntax Tree seen in IfSyntaxTree.jpg and determine if the if-statement being analyzed has the correct spacing").ElementAt(0), SyntaxFactory.CarriageReturnLineFeed);
            }

            internal static SyntaxNode BuildInitialize(SyntaxGenerator generator, INamedTypeSymbol notImplementedException, SyntaxList<StatementSyntax> statements, string name)
            {
                var type = SyntaxFactory.ParseTypeName("AnalysisContext");
                var parameters = new[] { generator.ParameterDeclaration(name, type) };

                if (notImplementedException != null)
                {
                    statements = statements.Add(generator.ThrowStatement(generator.ObjectCreationExpression(notImplementedException)) as StatementSyntax);
                }

                var initializeDeclaration = generator.MethodDeclaration("Initialize", parameters: parameters, accessibility: Accessibility.Public, modifiers: DeclarationModifiers.Override, statements: statements);
                return initializeDeclaration;
            }

        private static SyntaxNode CreateNewMethod(
            SyntaxGenerator generator, IMethodSymbol methodSymbol, int parameterIndex, Compilation compilation, INamedTypeSymbol uriType)
        {
            // create original parameter decl
            var originalParameter = generator.ParameterDeclaration(methodSymbol.Parameters[parameterIndex]);

            // replace original parameter type to System.Uri
            var newParameter = generator.ReplaceNode(originalParameter, generator.GetType(originalParameter), generator.TypeExpression(uriType));

            // create original method decl
            var original = generator.MethodDeclaration(methodSymbol, generator.DefaultMethodBody(compilation));

            // get parameters from original method decl
            var originalParameters = generator.GetParameters(original);

            // replace one of parameter to new one
            return generator.ReplaceNode(original, originalParameters[parameterIndex], newParameter);
        }

            // creates a method keeping everything except for the parameters, and inserting a parameter of type SyntaxNodeAnalysisContext
            protected internal static SyntaxNode CreateMethodWithContextParameter(SyntaxGenerator generator, MethodDeclarationSyntax methodDeclaration)
            {
                TypeSyntax type = SyntaxFactory.ParseTypeName("SyntaxNodeAnalysisContext");
                SyntaxNode[] parameters = new[] { generator.ParameterDeclaration("context", type) };
                string methodName = methodDeclaration.Identifier.Text;
                TypeSyntax returnType = methodDeclaration.ReturnType;
                SyntaxList<StatementSyntax> statements = methodDeclaration.Body.Statements;

                SyntaxNode newDeclaration = generator.MethodDeclaration(methodName, parameters, returnType: returnType, accessibility: Accessibility.Private, statements: statements);
                return newDeclaration;
            }

 private static SyntaxNode GetInitializationMethodSyntax(
     Language language,
     SyntaxGenerator syntaxGenerator,
     SemanticModel semanticModel)
 {
     // GENERATED CODE:
     //
     //     partial void ConfigureLooseBehavior();
     return syntaxGenerator.MethodDeclaration(
         "ConfigureLooseBehavior",
         accessibility: language == Language.VisualBasic ? Accessibility.Private : Accessibility.NotApplicable,
         modifiers: DeclarationModifiers.Partial);
 }

        private static SyntaxNode GetMethodDeclarationSyntax(
            SyntaxGenerator syntaxGenerator,
            SemanticModel semanticModel,
            IMethodSymbol methodSymbol)
        {
            if (methodSymbol.MethodKind != MethodKind.Ordinary)
            {
                return null;
            }

            var methodDeclaration = syntaxGenerator
                .MethodDeclaration(methodSymbol);
            methodDeclaration = syntaxGenerator
                .WithModifiers(
                    methodDeclaration,
                    syntaxGenerator
                        .GetModifiers(methodDeclaration)
                        .WithIsAbstract(false));
            methodDeclaration = syntaxGenerator
                .WithStatements(
                    methodDeclaration,
                    GetMethodStatementsSyntax(syntaxGenerator, semanticModel, methodSymbol));

            var csharpMethodDeclaration = methodDeclaration as MethodDeclarationSyntax;

            if (csharpMethodDeclaration != null)
            {
                // remove trailing semi-colon from the declaration
                methodDeclaration = csharpMethodDeclaration.WithSemicolonToken(SyntaxFactory.Token(SyntaxKind.None));
            }

            return methodDeclaration;
        }

      private SyntaxNode CreateEnsureProxyMethod(Compilation compilation, SyntaxGenerator g, GenerationNameTable nameTable, bool asAsync)
      {
         /*
            private async System.Threading.Tasks.Task EnsureProxyAsync()
            {
               if (m_cachedProxy != null && (
                   ((System.ServiceModel.ICommunicationObject)m_cachedProxy).State == System.ServiceModel.CommunicationState.Faulted ||
                   ((System.ServiceModel.ICommunicationObject)m_cachedProxy).State == System.ServiceModel.CommunicationState.Closed))
               {
                  await CloseProxyAsync().ConfigureAwait(false);
               }

               if (m_cachedProxy == null)
               {
                  var proxy = m_proxyFactory();
                  await System.Threading.Tasks.Task.Factory.FromAsync(((System.ServiceModel.ICommunicationObject)proxy).BeginOpen, ((System.ServiceModel.ICommunicationObject)proxy).EndOpen, null).ConfigureAwait(false);
                  m_cachedProxy = proxy;
               }
            }
         */
         return
            g.MethodDeclaration(
               asAsync ? nameTable[MemberNames.EnsureProxyAsyncMethod] : nameTable[MemberNames.EnsureProxyMethod],
               returnType: asAsync ? g.TypeExpression(compilation.RequireType<Task>()) : null,
               accessibility: Accessibility.Private,
               modifiers: asAsync ? DeclarationModifiers.Async : DeclarationModifiers.None,
               statements: new SyntaxNode[]
               {
                  //if (m_cachedProxy != null && (
                  //             ((System.ServiceModel.ICommunicationObject)m_cachedProxy).State == System.ServiceModel.CommunicationState.Faulted ||
                  //             ((System.ServiceModel.ICommunicationObject)m_cachedProxy).State == System.ServiceModel.CommunicationState.Closed))
                  g.IfStatement(
                     g.LogicalAndExpression(
                        // m_cachedProxy != null
                        g.ReferenceNotEqualsExpression(
                           g.MemberAccessExpression(
                              g.ThisExpression(),
                              nameTable[MemberNames.CachedProxyField]
                           ),
                           g.NullLiteralExpression()
                        ),
                        g.LogicalOrExpression(
                           // ((System.ServiceModel.ICommunicationObject)m_cachedProxy).State == System.ServiceModel.CommunicationState.Faulted
                           g.ValueEqualsExpression(
                              g.MemberAccessExpression(
                                 g.CastExpression(
                                    compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject"),
                                    g.MemberAccessExpression(
                                       g.ThisExpression(),
                                       nameTable[MemberNames.CachedProxyField]
                                    )
                                 ),
                                 "State"
                              ),
                              g.DottedName("System.ServiceModel.CommunicationState.Faulted")
                           ),
                           // ((System.ServiceModel.ICommunicationObject)m_cachedProxy).State == System.ServiceModel.CommunicationState.Faulted
                           g.ValueEqualsExpression(
                              g.MemberAccessExpression(
                                 g.CastExpression(
                                    compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject"),
                                    g.MemberAccessExpression(
                                       g.ThisExpression(),
                                       nameTable[MemberNames.CachedProxyField]
                                    )
                                 ),
                                 "State"
                              ),
                              g.DottedName("System.ServiceModel.CommunicationState.Closed")
                           )
                        )
                     ),
                     new SyntaxNode[]
                     {
                        // await CloseProxyAsync(false).ConfigureAwait(false);
                        // or
                        // CloseProxy(false);
                        AwaitExpressionIfAsync(g, asAsync,
                           g.InvocationExpression(
                              g.MemberAccessExpression(
                                 g.ThisExpression(),
                                 asAsync ? nameTable[MemberNames.CloseProxyAsyncMethod] : nameTable[MemberNames.CloseProxyMethod]
                              ),
                              g.FalseLiteralExpression()
                           )
                        )
                     }
                  ),
                  g.IfStatement(
                     g.ReferenceEqualsExpression(
                        g.MemberAccessExpression(
                           g.ThisExpression(),
                           nameTable[MemberNames.CachedProxyField]
                        ),
                        g.NullLiteralExpression()
                     ),
                     new SyntaxNode[]
                     {
                        g.LocalDeclarationStatement(
                           "proxy",
//.........这里部分代码省略.........

      private IEnumerable<SyntaxNode> CreateDisposeMethods(Compilation compilation, SyntaxGenerator g, GenerationNameTable nameTable, bool suppressWarningComments)
      {
         yield return g.AddWarningCommentIf(!suppressWarningComments,
         g.MethodDeclaration(
            "Dispose",
            accessibility: Accessibility.Public,
            statements: new SyntaxNode[]
            {
               g.InvocationExpression(
                  g.MemberAccessExpression(
                     g.ThisExpression(),
                     "Dispose"
                  ),
                  g.TrueLiteralExpression()
               ),
               g.InvocationExpression(
                  g.MemberAccessExpression(
                     g.TypeExpression(compilation.RequireTypeByMetadataName("System.GC")),
                     "SuppressFinalize"
                  ),
                  g.ThisExpression()
               )
            }
         ))
         .PrependLeadingTrivia(g.CreateRegionTrivia("IDisposable"));


         yield return g.AddWarningCommentIf(!suppressWarningComments, g.MethodDeclaration(
            "Dispose",
            parameters: new SyntaxNode[] { g.ParameterDeclaration("disposing", g.TypeExpression(SpecialType.System_Boolean)) },
            accessibility: Accessibility.Private,
            statements: new SyntaxNode[]
            {
               g.IfStatement(
                  g.ValueEqualsExpression(
                     g.IdentifierName("disposing"),
                     g.TrueLiteralExpression()
                  ),
                  new SyntaxNode[]
                  {
                     g.TryCatchStatement(
                        new SyntaxNode[]
                        {
                           g.ExpressionStatement(
                              g.InvocationExpression(
                                 g.MemberAccessExpression(
                                    g.ThisExpression(),
                                    nameTable[MemberNames.CloseProxyMethod]
                                 ),
                                 g.FalseLiteralExpression()
                              )
                           )
                        },
                        new SyntaxNode[]
                        {
                           g.CatchClause(new SyntaxNode [0])
                        }
                     )
                  }
               )
            }
         )).AddTrailingTrivia(g.CreateEndRegionTrivia());
      }

 private SyntaxNode CreateCloseProxyMethod(Compilation compilation, SyntaxGenerator g, GenerationNameTable nameTable, bool asAsync)
 {
    return
       g.MethodDeclaration(
          asAsync ? nameTable[MemberNames.CloseProxyAsyncMethod] : nameTable[MemberNames.CloseProxyMethod],
          returnType: asAsync ? g.TypeExpression(compilation.RequireType<Task>()) : null,
          parameters: new SyntaxNode[] { g.ParameterDeclaration("alwaysAbort", g.TypeExpression(SpecialType.System_Boolean)) },
          modifiers: asAsync ? DeclarationModifiers.Async : DeclarationModifiers.None,
          accessibility: Accessibility.Private,
          statements: new SyntaxNode[]
          {
             g.IfStatement(
                g.ReferenceNotEqualsExpression(
                   g.IdentifierName(nameTable[MemberNames.CachedProxyField]),
                   g.NullLiteralExpression()
                ),
                new SyntaxNode[]
                {
                   g.LocalDeclarationStatement(
                      "proxy",
                      g.TryCastExpression(
                         g.MemberAccessExpression(
                            g.ThisExpression(),
                            nameTable[MemberNames.CachedProxyField]
                         ),
                         compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject")
                      )
                   ),
                   g.TryFinallyStatement(
                      new SyntaxNode[]
                      {
                         AwaitExpressionIfAsync(g, asAsync,
                            g.InvocationExpression(
                               g.IdentifierName(asAsync ? nameTable[MemberNames.CloseProxyAsyncMethod] : nameTable[MemberNames.CloseProxyMethod]),
                               g.IdentifierName("proxy"),
                               g.IdentifierName("alwaysAbort")
                            )
                         )
                      },
                      new SyntaxNode[]
                      {
                         g.AssignmentStatement(
                            g.MemberAccessExpression(
                               g.ThisExpression(),
                               nameTable[MemberNames.CachedProxyField]
                            ),
                            g.NullLiteralExpression()
                         )
                      }
                   )
                }
             )
          }
       );
 }

      private SyntaxNode CreateStaticCloseProxyMethod(Compilation compilation, SyntaxGenerator g, GenerationNameTable nameTable, bool asAsync)
      {
         //private static void CloseProxy(System.ServiceModel.ICommunicationObject proxy, bool alwaysAbort)
         //{
         //   try
         //   {
         //      if (proxy != null && proxy.State != System.ServiceModel.CommunicationState.Closed)
         //      {
         //         if (!alwaysAbort && proxy.State != System.ServiceModel.CommunicationState.Faulted)
         //         {
         //            proxy.Close();
         //         }
         //         else
         //         {
         //            proxy.Abort();
         //         }
         //      }
         //   }
         //   catch (System.ServiceModel.CommunicationException)
         //   {
         //      proxy.Abort();
         //   }
         //   catch (System.TimeoutException)
         //   {
         //      proxy.Abort();
         //   }
         //   catch
         //   {
         //      proxy.Abort();
         //      throw;
         //   }
         //}                  
         
         return g.MethodDeclaration(
            asAsync ? nameTable[MemberNames.CloseProxyAsyncMethod] : nameTable[MemberNames.CloseProxyMethod],
            accessibility: Accessibility.Private,
            returnType: asAsync ? g.TypeExpression(compilation.RequireType<Task>()) : null,
            modifiers: (asAsync ? DeclarationModifiers.Async : DeclarationModifiers.None) | DeclarationModifiers.Static,
            parameters: new SyntaxNode[]
            {
               g.ParameterDeclaration("proxy", g.TypeExpression(compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject"))),
               g.ParameterDeclaration("alwaysAbort", g.TypeExpression(SpecialType.System_Boolean))

            },
            statements: new SyntaxNode[]
            {
               g.TryCatchStatement(
                  new SyntaxNode[]
                  {
                     // if (proxy != null && proxy.State != System.ServiceModel.CommunicationState.Closed)
                     g.IfStatement(
                        g.LogicalAndExpression(
                           g.ReferenceNotEqualsExpression(
                              g.IdentifierName("proxy"),
                              g.NullLiteralExpression()
                           ),
                           g.ValueNotEqualsExpression(
                              g.MemberAccessExpression(
                                 g.IdentifierName("proxy"),
                                 "State"
                              ),
                              g.DottedName("System.ServiceModel.CommunicationState.Closed")
                           )
                        ),
                        new SyntaxNode[]
                        {
                           // if (!alwaysAbort && proxy.State != System.ServiceModel.CommunicationState.Faulted)
                           g.IfStatement(
                              g.LogicalAndExpression(
                                 g.LogicalNotExpression(
                                    g.IdentifierName("alwaysAbort")
                                 ),
                                 g.ValueNotEqualsExpression(
                                    g.MemberAccessExpression(
                                       g.IdentifierName("proxy"),
                                       "State"
                                    ),
                                    g.DottedName("System.ServiceModel.CommunicationState.Faulted")
                                 )
                              ),
                              new SyntaxNode[]
                              {
                                 g.ExpressionStatement(
                                 asAsync ? 
                                 // await System.Threading.Tasks.Task.Factory.FromAsync(proxy.BeginClose, proxy.EndClose, null).ConfigureAwait(false);
                                 AwaitExpression(g,
                                    g.InvocationExpression(
                                       g.DottedName("System.Threading.Tasks.Task.Factory.FromAsync"),
                                       g.DottedName("proxy.BeginClose"),
                                       g.DottedName("proxy.EndClose"),
                                       g.NullLiteralExpression()
                                    )
                                 )
                                 :
                                 // proxy.Close();
                                 g.InvocationExpression(
                                       g.MemberAccessExpression(
                                          g.IdentifierName("proxy"),
                                          "Close"
                                       )
//.........这里部分代码省略.........

//.........这里部分代码省略.........

         // ==> catch
         // ==> {
         // ==>    this.CloseProxy(false);
         // ==>    throw;
         // ==> }
         var catchAndCloseProxyStatement = gen.CatchClause(new SyntaxNode[]
            {
               // ==> this.CloseProxy(false);
               gen.ExpressionStatement(
                  gen.InvocationExpression(
                     gen.MemberAccessExpression(
                        gen.ThisExpression(),
                        nameTable[MemberNames.CloseProxyMethod]
                     ),
                     gen.FalseLiteralExpression()
                  )
               ),

               // throw;
               gen.ThrowStatement()
            });


         foreach (var sourceMethodEntry in methods.AsSmartEnumerable())
         {
            var sourceMethod = sourceMethodEntry.Value;

            using (nameTable.PushScope(sourceMethod.Parameters.Select(p => p.Name)))
            {
               bool isAsync = ReturnsTask(semanticModel.Compilation, sourceMethod);
               bool isVoid = sourceMethod.ReturnType.SpecialType == SpecialType.System_Void || sourceMethod.ReturnType.Equals(semanticModel.Compilation.RequireType<Task>());

               SyntaxNode targetMethod = gen.MethodDeclaration(sourceMethod);

               if (sourceMethodEntry.IsFirst)
                  targetMethod = targetMethod.PrependLeadingTrivia(gen.CreateRegionTrivia("Contract Methods")).AddLeadingTrivia(gen.NewLine());

               targetMethod = gen.AddWarningCommentIf(!suppressWarningComments, targetMethod);

               targetMethod = gen.WithModifiers(targetMethod, isAsync ? DeclarationModifiers.Async : DeclarationModifiers.None);


               targetMethod = gen.WithStatements(targetMethod, new SyntaxNode[]
                  {
                  // ==> try {
                  gen.TryCatchStatement(new SyntaxNode[]
                     {
                        CreateProxyVaraibleDeclaration(gen, nameTable, isAsync),
                        CreateProxyInvocationStatement(semanticModel.Compilation, gen, nameTable, sourceMethod)

                     }, new SyntaxNode[]
                     {
                        catchAndCloseProxyStatement
                     }
                  )
                  });

               targetMethod = targetMethod.AddNewLineTrivia();

               if (sourceMethodEntry.IsLast && !(isAsync && includeCancellableAsyncMethods))
                  targetMethod = targetMethod.AddTrailingTrivia(gen.CreateEndRegionTrivia()).AddNewLineTrivia();

               targetClass = gen.AddMembers(targetClass, targetMethod);

               if (isAsync && includeCancellableAsyncMethods)

 private SyntaxNode CreateGetProxyMethod(Compilation compilation, SyntaxGenerator g, INamedTypeSymbol proxyInterface, GenerationNameTable nameTable, bool isAsync)
 {
    //private IProxy GetProxy()
    //{
    //   EnsureProxy();
    //   return m_cachedProxy;
    //}
    return g.MethodDeclaration(
       isAsync ? nameTable[MemberNames.GetProxyAsyncMethod] : nameTable[MemberNames.GetProxyMethod],
       returnType: g.TypeExpression(isAsync ? compilation.RequireType(typeof(Task<>)).Construct(proxyInterface) : proxyInterface),
       accessibility: Accessibility.Private,
       modifiers: isAsync ? DeclarationModifiers.Async : DeclarationModifiers.None,
       statements: new SyntaxNode[]
       {
          g.ExpressionStatement(
             AwaitExpressionIfAsync(g, isAsync,
                g.InvocationExpression(
                   g.MemberAccessExpression(
                      g.ThisExpression(),
                      isAsync ? nameTable[MemberNames.EnsureProxyAsyncMethod] : nameTable[MemberNames.EnsureProxyMethod]
                   )
                )
             )
          ),
          g.ReturnStatement(
             g.MemberAccessExpression(
                g.ThisExpression(),
                nameTable[MemberNames.CachedProxyField]
             )
          )
       }
    );
 }

      public ClassDeclarationSyntax GenerateProxyClass(SemanticModel semanticModel, SyntaxGenerator generator, INamedTypeSymbol sourceProxyInterface, string name, Accessibility accessibility, bool suppressWarningComments, MemberAccessibility constructorAccessibility, out IEnumerable<IMethodSymbol> sourceConstructors)
      {
         if (name == null)
         {
            if (sourceProxyInterface.Name.StartsWith("I"))
               name = sourceProxyInterface.Name.Substring(1) + "Proxy";
            else
               name = sourceProxyInterface.Name + "Proxy";
         }

         var compilation = semanticModel.Compilation;

         // Resolve the callback contract if any
         ITypeSymbol serviceContractAttributeType = compilation.RequireTypeByMetadataName("System.ServiceModel.ServiceContractAttribute");
         AttributeData serviceContractAttribute = sourceProxyInterface.GetAttributes().FirstOrDefault(attr => attr.AttributeClass.Equals(serviceContractAttributeType));
         if (serviceContractAttribute == null)
            throw new CodeGeneratorException(sourceProxyInterface, $"The interface {sourceProxyInterface.Name} is not decorated with ServiceContractAttribute.");

         ITypeSymbol callbackContractType;
         var callbackContractArg = serviceContractAttribute.NamedArguments.FirstOrDefault(arg => arg.Key.Equals("CallbackContract"));
         if (callbackContractArg.Key != null)
            callbackContractType = callbackContractArg.Value.Value as ITypeSymbol;
         else
            callbackContractType = null;

         // Resolve the base type (ClientBase or DuplexClientBase depending on whether a CallbackContract exists or not)
         INamedTypeSymbol baseType;
         if (callbackContractType != null)
         {
            baseType = compilation.RequireTypeByMetadataName("System.ServiceModel.DuplexClientBase`1").Construct(sourceProxyInterface);
         }
         else
         {
            baseType = compilation.RequireTypeByMetadataName("System.ServiceModel.ClientBase`1").Construct(sourceProxyInterface);
         }

         // Create class declaration
         SyntaxNode targetClass = generator.ClassDeclaration(name, accessibility: accessibility, baseType: generator.TypeExpression(baseType), interfaceTypes: new[] { generator.TypeExpression(sourceProxyInterface) });

         targetClass = generator.AddWarningCommentIf(!suppressWarningComments, targetClass);


         // Copy constructors from base class.
         sourceConstructors = baseType.Constructors.Where(ctor => ctor.DeclaredAccessibility != Accessibility.Private).ToImmutableArray();

         foreach (var baseCtor in sourceConstructors)
         {
            var targetCtor = generator.ConstructorDeclaration(baseCtor, baseCtor.Parameters.Select(p => generator.Argument(generator.IdentifierName(p.Name))));

            targetCtor = generator.AddWarningCommentIf(!suppressWarningComments, targetCtor);

            targetCtor = generator.WithAccessibility(targetCtor, ToAccessibility(constructorAccessibility));
            targetClass = generator.AddMembers(targetClass, targetCtor.AddNewLineTrivia());
         }

         foreach (IMethodSymbol sourceMethod in GetOperationContractMethods(semanticModel.Compilation, sourceProxyInterface))
         {
            SyntaxNode targetMethod = generator.MethodDeclaration(sourceMethod);

            targetMethod = generator.AddWarningCommentIf(!suppressWarningComments, targetMethod);

            targetMethod = generator.WithModifiers(targetMethod, DeclarationModifiers.None);

            bool isVoid = sourceMethod.ReturnType.SpecialType == SpecialType.System_Void;
            targetMethod = targetMethod.AddNewLineTrivia().AddNewLineTrivia();

            var expression = generator.InvocationExpression(
               generator.MemberAccessExpression(
                  generator.MemberAccessExpression(
                     generator.BaseExpression(),
                     "Channel"
                  ),
                  sourceMethod.Name
               ),
               sourceMethod.Parameters.Select(p => generator.IdentifierName(p.Name)).ToArray()
            );

            SyntaxNode statement;
            if (!isVoid)
               statement = generator.ReturnStatement(expression);
            else
               statement = generator.ExpressionStatement(expression);

            targetMethod = generator.WithStatements(targetMethod,
               new[]
               {
                  statement
               }
            );
            targetClass = generator.AddMembers(targetClass, targetMethod.AddNewLineTrivia());
         }

         return (ClassDeclarationSyntax)targetClass;
      }