[HELP] Gmail Dot Trick - Any .NET Examples?

using System.Collections.Generic;
using System.Linq;
using System.Text;
using Combinations;


namespace DotTrick
{
    public static class DotTrickClass
    {
        public static List<string> Generate(string email, int maxEmails)
        {
            string emailName = email.Replace("@gmail.com", string.Empty).Trim();
            List<string> results = new List<string>();
            IEnumerable<int> positions = Enumerable.Range(1, emailName.Length - 1);
            for (int i = 1; i <= positions.Count(); ++i)
            {
                Combinations<int> positionGenerator = new Combinations<int>(positions, i);
                foreach (int[] currentPositions in positionGenerator)
                {
                    StringBuilder emailBuilder = new StringBuilder(emailName);
                    foreach (int currentPosition in currentPositions.Reverse())
                    {
                        emailBuilder.Insert(currentPosition, '.');
                    }
                    results.Add(emailBuilder.ToString());
                    if (results.Count == maxEmails)
                    {
                        return results;
                    }
                }
            }
            return results;
        }
    }
}