public GraphQLQueries(OrderRepository orderRepository, OrderItemRepository orderItemRepository) { #region Order Field<ListGraphType<OrderType>>( "orders", resolve: context => orderRepository.GetAll()); Field<OrderType>( "order", arguments: new QueryArguments(new QueryArgument<NonNullGraphType<IdGraphType>> { Name = "id" }), resolve: context => { var id = context.GetArgument<int>("id"); return orderRepository.GetOne(id); }); #endregion #region OrderItems Field<ListGraphType<OrderItemType>>( "orderItems", resolve: context => orderItemRepository.GetAll()); Field<OrderItemType>( "orderItemsForOrder", arguments: new QueryArguments(new QueryArgument<NonNullGraphType<IdGraphType>> { Name = "id" }), resolve: context => { var id = context.GetArgument<int>("id"); return orderItemRepository.GetForOrder(id); }); #endregion }