Simple string hash

Program.cs

using System;
using System.Security.Cryptography;
using System.Text;

namespace Security
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("hello@world.com".Hash());
        }
    }

    public static class StringExtensions
    {
        public static string Hash(this string input)
        {
            var builder = new StringBuilder();

            using (var algorithm = SHA256.Create())
            {
                var bytes = algorithm.ComputeHash(Encoding.UTF8.GetBytes(input));

                foreach (var b in bytes)
                {
                    builder.Append(b.ToString("X2"));
                }

                return builder.ToString();
            }
        }
    }
}