day5.cs

 
            byte[] data = null;
            List<byte[]> dataList = new List<byte[]>();
            string inputCopy = input;
            // Convert the input string to a byte array and compute the hash.
            do
            {
                 Console.WriteLine("The index " + index+ ".");
                inputCopy = input;
                inputCopy += index.ToString();
                data = md5Hash.ComputeHash(Encoding.UTF8.GetBytes(inputCopy));
                if(data[1] == 0)
                {
                    if (data[1] == 0)
                    {
                        if (data[2] == 0)
                        {
                            if (data[3] == 0)
                            {
                                if (data[4] == 0)
                                {
                                    dataList.Add(data);
                                }
                            }
                        }
                    }
                }
                index++;
            } while (dataList.Count < 8);
            // Create a new Stringbuilder to collect the bytes
            // and create a string.
            StringBuilder sBuilder = new StringBuilder();

            // Loop through each byte of the hashed data 
            // and format each one as a hexadecimal string.

                sBuilder.Append(data[5].ToString("x2"));
            
            
            // Return the hexadecimal string.
            return sBuilder.ToString();