Compare two List<string> using LINQ

In this post, we will see how to compare two List<string> and list the elements found in one List<string> but not in the other. We will be using the Enumerable.Except method

C#

static void Main(string[] args)
{
    List<string> lstOne =
        new List<string>() { "Jim", "Jack", "Kate", "Nope" };

   List<string> lstTwo =
       new List<string>() { "Jack", "Nope", "Jim" };

    IEnumerable<string> lstNew = null;

    // Compare two List<string> and display items of lstOne not in lstTwo
    lstNew = lstOne.Except(lstTwo, StringComparer.OrdinalIgnoreCase);

    PrintList(lstNew);
    Console.ReadLine();
}

static void PrintList(IEnumerable<string> str)
{
   foreach (var s in str)

       Console.WriteLine(s);
    Console.WriteLine("-------------");
}

OUTPUT

Read some more tips in my article over here Some Common Operations using List<string>

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About The Author

Suprotim Agarwal, ASP.NET Architecture MVP works as an Architect Consultant and provides consultancy on how to design and develop Web applications.

Suprotim is also the founder and primary contributor to DevCurry, DotNetCurry and SQLServerCurry. He has also written an EBook 51 Recipes using jQuery with ASP.NET Controls.

Follow him on twitter @suprotimagarwal