using System;
using System.Collections.Generic;
using System.Linq;
public class Test
{
public static void Main()
{
var oldList = new List<int>() { 1, 2, 3, 4, 5 };
var newList = new List<int>() { 1, 2, 3, 6, 7 };
var value = oldList.Except(newList);
foreach (var i in value)
{
Console.WriteLine(i);
}
}
}
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