public FrontendRoot(IProductRepo productRepo)
{
Name = "query";
Field <ProductType>("product",
arguments: new QueryArguments(
new QueryArgument <NonNullGraphType <IntGraphType> > {
Name = "id", Description = "id of the product"
}
),
resolve: context => productRepo.GetProduct(context.GetArgument <int>("id")));
Field <ListGraphType <ProductType>, Product[]>().Name("all")
.Resolve(context => productRepo.AllProducts());
}