public abstract class BaseStorage<T, K>
    {
        public virtual Response<T> GetDemo(Request<K> request)
        {
            throw new NotImplementedException();
        }
    }


    public class ChildStorage : BaseStorage<MyDto, int>
    {
        public override Response<MyDto> GetDemo(Request<int> request)
        {
            return new Response<MyDto>();
        }
    }