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

namespace SaveWizard_rewritten
{
    static class Utils
    {
        public static string GenerateMD5(string filename)
        {
            if (!File.Exists(filename))
                return null;
            using (var md5 = MD5.Create())
            {
                using (FileStream stream = File.OpenRead(filename))
                    md5.ComputeHash(stream);
                
                StringBuilder sb = new StringBuilder();
                byte[] hash = md5.Hash;
                for (int i = 0; i < hash.Length; i++)
                    sb.Append(hash[i].ToString("x2"));

                return sb.ToString();
            }
        }
    }
}