Redundant inheritance?

Question

Consider that classes

public class Category { }
public class Product { }

public interface IService<T> { }
public class ServiceBase<T> : IService<T> { }

public class CategoryService : ServiceBase<Category> { }
public class ProductService : ServiceBase<Product>, IService<Product> { }

Is inheritances of ProductService redundant? Just ServiceBase<Product> is enough?

I just made tests like this

static void Main(string[] args) {
    Console.WriteLine("CategoryService interfaces:");
    foreach(var item in typeof(CategoryService).GetInterfaces()) {
        Console.WriteLine(item.Name);
    }

    Console.WriteLine("ProductService interfaces:");
    foreach(var item in typeof(ProductService).GetInterfaces()) {
        Console.WriteLine(item.Name);
    }

    Console.ReadKey();
}

output

CategoryService interfaces:
IService`1
ProductService interfaces:
IService`1

Answer 1

Yes it's redundant.

You can remove it and ProductService will still implement IService<Product>