I want to get the names of all properties that changed for matching objects. I have these (simplified) classes:

public enum PersonType { Student, Professor, Employee }

class Person {
    public string Name { get; set; }
    public PersonType Type { get; set; }
}

class Student : Person {
     public string MatriculationNumber { get; set; }
}

class Subject {
     public string Name { get; set; }
     public int WeeklyHours { get; set; }
}

class Professor : Person {
    public List<Subject> Subjects { get; set; }
}

Now I want to get the objects where the Property values differ:

List<Person> oldPersonList = ...
List<Person> newPersonList = ...
List<Difference> = GetDifferences(oldPersonList, newPersonList);

public List<Difference> GetDifferences(List<Person> oldP, List<Person> newP) {
     //how to check the properties without casting and checking 
     //for each type and individual property??
     //can this be done with Reflection even in Lists??
}

In the end I would like to have a list of Differences like this:

class Difference {
    public List<string> ChangedProperties { get; set; }
    public Person NewPerson { get; set; }
    public Person OldPerson { get; set; }
}

The ChangedProperties should contain the name of the changed properties.