using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        List<string> strings = new List<string>();

        strings.Add("mont-test-100.[2].jpg");

        strings.Add("mont-test-100.[8].jpg");

        strings.Add("mont-test-100.[10].jpg");

        strings.Add("mont-test-100.[50].jpg");

​

        // ... Sort in place

        //     Sort the strings by their first letter.

        //     We access the first character of the string and compare that.

        //     This uses a lambda expression.

        strings.Sort((a, b) => (a[0].CompareTo(b[0])));

​

        Console.WriteLine(":::SORTED BY FIRST LETTER:::");

        foreach (var result in strings)

        {

            Console.WriteLine(result);

        }

    }

}