using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var names = new List<string> { "abc", "Abc", "Bca", "bca" };

        names.Sort((a, b) =>

        {

            var compare = string.Compare(a, b, StringComparison.OrdinalIgnoreCase);

            if (compare != 0)

                return compare;

            compare = string.Compare(a, b, StringComparison.Ordinal);

            return compare;

        });

        names.Dump();

    }

}