create a class with props int Id, string name then create an interface for it including Rename(string name) method in it

class Person
{
    public int Id { get; set; }
    public string Name { get; set; }
}

interface Renamable
{
    void Rename(string name);
}

class Program
{

    static void Main(string[] args)
    {
        Person p = new Person();
        p.Id = 100;
        p.Name = "dd";

        var renamer = p as Renamable;
        renamer.Rename("new name");
    }
}