public static string Generate()
        {
            var sb = new StringBuilder();

            for (var i = 1; i < 11; i++)
            {
                var n = BitEncoding.ByteToB64(Random.Next(0, 63));
                sb.Append(n);
            }
            return(sb.ToString());
        }
        public static string Generate(string name)
        {
            var bytes  = Encoding.UTF8.GetBytes(name);
            var sha256 = new System.Security.Cryptography.SHA256CryptoServiceProvider();
            var hash   = sha256.ComputeHash(bytes);

            var sb = new StringBuilder();

            for (var i = 1; i < 11; i++)
            {
                var n = BitEncoding.ByteToB64(hash[i] & 63);
                sb.Append(n);
            }
            return(sb.ToString());
        }