How do I compare two lists and return 3 categoried lists

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i have tow lists have the same properties and i want to compare the data between old and new DB

C#

List<srsEmployee> srsEmps = db.srsEmployees.ToList(); //from old DB
    List<destEmployee> destEmps = db2.destEmployees.ToList(); //from new DBs

i need Three list shown in the view
1.Newly Added Employee
2.Deleted Employee
3.Common Employee
so anyone can help me ?

this query what i wrote but the result isn't right

What I have tried:

    var Common = destEmps.Where(n => srsEmps.Any(o => o.EmpCode == n.EmpCode)).ToList();
    var Deleted = srsEmps.Where(o => !destEmps.Any(n => n.EmpCode == o.EmpCode)).ToList();
    var NewlyAdded = destEmps.Where(n => !srsEmps.Any(o => o.EmpCode == n.EmpCode)).ToList();
<pre>

Posted 16-Oct-18 5:23am

Member 13168476

Updated 16-Oct-18 7:19am

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Richard Deeming 16-Oct-18 12:38pm

What does "isn't right" mean?

Remember, we can't see your screen, access your database, or read your mind. All we have to work with is what you tell us. So help us to help you by telling us what we need to know. :)

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MadMyche · Accepted Answer · 2018-10-16T07:19:00

I do not profess to being adept with LINQ, but did give it a shot with this Proof-of-Concept and it works as I would intend it to.

It is not a 100% solution for you as is, but should be a good base to work with.

C#

namespace ProofOfConcept {
	public class Employee {
		public int EmpCode { get; set; }
		public string EmpName { get; set; }

		public Employee() { }
		public Employee(int Code, string Name) {
			EmpCode = Code;
			EmpName = Name;
		}
	}

	class Program {
		static void Main(string[] args) {

			List<Employee> srsEmps = new List<Employee>();
				srsEmps.Add(new Employee(1, "Me"));
				srsEmps.Add(new Employee(2, "You"));

			List<Employee> destEmps = new List<Employee>();
				destEmps.Add(new Employee(2, "You"));
				destEmps.Add(new Employee(3, "Someone Else"));

			var Deleted =
				from s in srsEmps
				where !(from d in destEmps select d.EmpCode).Contains(s.EmpCode)
				select s;

			var Common =
				from s in srsEmps
				where (from d in destEmps select d.EmpCode).Contains(s.EmpCode)
				select s;

			var NewlyAdded =
				from d in destEmps
				where !(from s in srsEmps select s.EmpCode).Contains(d.EmpCode)
				select d;

			foreach (Employee d in Deleted) {
				Console.WriteLine("Deleted = " + d.EmpName);
			}
			foreach (Employee c in Common) {
				Console.WriteLine("Common = " + c.EmpName);
			}
			foreach (Employee n in NewlyAdded) {
				Console.WriteLine("New = " + n.EmpName);
			}

			Console.WriteLine("Press any key to continue");
			Console.ReadLine();
		}
	}
}