public ApiMutation(IAutoMakerServices autoMakerServices, ICarServices carServices) { Name = "Mutation"; Field <AutoMakerType>( "createautomaker", description: "Create a new Automaker", arguments: new QueryArguments( new QueryArgument <AutoMakerInputType> { Name = "input" } ), resolve: (context) => { var dto = autoMakerServices.Create(context.GetArgument <AutoMakerDto>("input")); if (dto.Valid) { return(dto); } throw new ExecutionError(dto.Message); } ); Field <CarType>( "createcar", description: "Create a new Car", arguments: new QueryArguments( new QueryArgument <CarInputType> { Name = "input" } ), resolve: (context) => { var dto = carServices.Create(context.GetArgument <CarDto>("input")); if (dto.Valid) { return(dto); } throw new ExecutionError(dto.Message); } ); }