using System;

public class Program

{

    public static void Main()

    {

        var p = new MyProduct();

        p.Name = "test";

        Console.WriteLine(p.GetName());

    }

}

​

​

public class Product

{

    public int Id { get; set; }

    public string Name { get; set; }

    public string Foo { get; set; }

}

public class Variant

{

    public int Id { get; set; }

    public string Name { get; set; }

    public string Bar { get; set; }

}

​

public class MyProduct: Product, IType {

}

​

public class MyVariant: Variant, IType {

}

​

​

public static class Extensions {

    public static string GetName(this IType type){

        return type.Name;

    }

}

​

public interface IType {

    string Name {get; set; }

}