protected override ISyntaxVisitorAction Enter( DocumentNode node, IDocumentValidatorContext context) { context.Names.Clear(); for (int i = 0; i < node.Definitions.Count; i++) { IDefinitionNode definition = node.Definitions[i]; if (definition.Kind == NodeKind.FragmentDefinition) { FragmentDefinitionNode fragment = (FragmentDefinitionNode)definition; if (!context.Names.Add(fragment.Name.Value)) { context.Errors.Add(context.FragmentNameNotUnique(fragment)); } } } context.Names.Clear(); return(Continue); }