designPatternGuru/DesignPatternGuru/FactoryMethod/Creators/Creator.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using FactoryMethod.Products;

namespace FactoryMethod.Creators
{
    abstract internal class Creator
    {
        public abstract IProduct FactoryMethod();

        public string SomeOperation()
        {
            var prodcut = FactoryMethod();
            var result = $"Creator: The same creator's code has just worked with {prodcut.Operation()}";

            return result;
        }
    }
}