Compare 2 list objects

Hi OP,

You should implement the interface of IEqualityComparer<Employee> to implement the comparation of Summary and Description, see this sample:

using System.Linq;
using System.Collections.Generic;
 
namespace MultiCore
{
    public class MyComparer : IEqualityComparer<Employee>
    {
        public bool Equals(Employee x, Employee y)
        {
            return (x.Summary == y.Summary && x.Description== y.Description);
        }
 
        public int GetHashCode(Employee obj)
        {
            return obj.Summary.GetHashCode() ^ obj.Description.GetHashCode();
        }
    }
 
    public class Employee
    {
        public long EmployeeId { get; set; }
        public string Summary { get; set; }
        public string Description { get; set; }
    }
 
    class MainTest
    {
        static void Main(string[] args)
        {
            List<Employee> oldemployees = null; //"Assignment" ignored
            List<Employee> newemployees = null; //"Assignment" ignored
 
            var differenceResult = oldemployees.Except(newemployees, new MyComparer());
        }
    }
}

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