using System;

using System.Threading.Tasks;

public class Program

{   

    public enum MyEnum

    {

         FirstMem,

         SecondMem

    }

    public class PS

    {

        public int i;

        public Enum anEnum;

        public override bool Equals(object obj)

        {

            if (!(obj is PS details))

            {

                return false;   

            }

            return (i == details.i) 

                && (anEnum == details.anEnum);

        }

        public override int GetHashCode()

        {

            var hashCode = i.GetHashCode();

            hashCode = (hashCode * 397) ^ anEnum.GetHashCode();

            return hashCode;

        }

        public static bool operator ==(PS lhs, PS rhs)

        {

            if ((object)lhs == null)

                return (object)rhs == null;

​

            return lhs.Equals(rhs);

        }

        public static bool operator !=(PS lhs, PS rhs)

        {

            if ((object)lhs == null)

                return (object)rhs != null;

​

            return !(lhs.Equals(rhs));

        }

    }

    public static void Main()

    {

        PS sub = new PS(){i = 10, anEnum = MyEnum.FirstMem};

        PS sub2 = new PS(){i = 10, anEnum = MyEnum.FirstMem};

        bool equal = sub == sub2 ;

        Console.WriteLine($"Are sub and sub2 equal : {equal}");

        Console.WriteLine($"Are sub: {sub.anEnum.GetHashCode()}");

        Console.WriteLine($"Are sub2 : {sub2.anEnum.GetHashCode()}");

    }

}