Find difference between two Lists using C# in ASP.Net Core MVC

Hi rani,

Check this example. Now please take its reference and correct your code.

Controller

public class HomeController : Controller
{
    public IActionResult Index()
    {
        List<string> list1 = new List<string> { "a", "b", "c" };
        List<string> list2 = new List<string> { "A", "c", "F", "x" };
        List<string> others = Compare(list1, list2);

        return View();
    }

    public List<string> Compare(List<string> list1, List<string> list2)
    {
        List<string> result = new List<string>();
        result.AddRange(list1.Except(list2, StringComparer.OrdinalIgnoreCase));
        result.AddRange(list2.Except(list1, StringComparer.OrdinalIgnoreCase));
        return result;
    }
}

Screenshot