public static ClassDeclarationSyntax AddSuppressMessageAttribute(this ClassDeclarationSyntax classDeclaration, SuppressMessageAttribute suppressMessage) { if (classDeclaration == null) { throw new ArgumentNullException(nameof(classDeclaration)); } if (suppressMessage == null) { throw new ArgumentNullException(nameof(suppressMessage)); } if (string.IsNullOrEmpty(suppressMessage.Justification)) { throw new ArgumentException(nameof(suppressMessage.Justification)); } var attributeArgumentList = SyntaxFactory.AttributeArgumentList( SyntaxFactory.SeparatedList <AttributeArgumentSyntax>(SyntaxFactory.NodeOrTokenList( SyntaxFactory.AttributeArgument(SyntaxLiteralExpressionFactory.Create(suppressMessage.Category)), SyntaxTokenFactory.Comma(), SyntaxFactory.AttributeArgument(SyntaxLiteralExpressionFactory.Create(suppressMessage.CheckId)), SyntaxTokenFactory.Comma(), SyntaxFactory.AttributeArgument(SyntaxLiteralExpressionFactory.Create(suppressMessage.Justification !)) .WithNameEquals( SyntaxNameEqualsFactory.Create(nameof(SuppressMessageAttribute.Justification)) .WithEqualsToken(SyntaxTokenFactory.Equals()))))); return(classDeclaration .AddAttributeLists(SyntaxAttributeListFactory.Create(nameof(SuppressMessageAttribute), attributeArgumentList))); }