Question

I have a class :

  public class Person
    {
        public string name { get; set; }
        public int  age { get; set; }
    }

        Person p1 = new Person() { age=1, name="a" };
        Person p2 = new Person() { age = 1, name = "b" };

I want to do something like

p1.equals(p2)

but by age or by name

I don’t mean in a way of adding to dictionary ( and use Iequatable…)

the Equals method Doesnt take any Helper inside it …

is there any way that i can send him my specific helper class just like :

   Dictionary<PersonForDictionary, int> dct2 =
 new Dictionary<PersonForDictionary, int>(new helperClass()); // here helperclass is a class which I gave him - and told the dictionary how to equate objects....

Im looking for a similar solution when equating objects. ( not in dictionary mode).

Answer 1

Could be, may be also like make different implementations of IComparable.
For example:

public class Person
{
   public string name { get; set; }
   public int  age { get; set; }

   pulbic int ComparePerson(Person person, IComparable comparer)
   {
     return comparer.Compare(this, person);
   } 
}

after implement different classes:

public class PersonNameComparer : IComparer
{
}

or another

public class PersonAgeComparer : IComparer
{
}

and use it inside:

Person p1 = new Person() { age=1, name="a" };
Person p2 = new Person() { age = 1, name = "b" };

p1.Compare(p2, new PersonNameComparer ());
p1.Compare(p2, new PersonAgeComparer ());