md5 加盐

 private void button1_Click(object sender, EventArgs e)
        {
            string s = GetMd5(textBox1.Text.Trim());
            MessageBox.Show(s);
        }
        private static string GetMd5(string sDataIn)
        {
            MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
            byte[] bytValue, bytHash;
            bytValue = System.Text.Encoding.UTF8.GetBytes(sDataIn);
            bytHash = md5.ComputeHash(bytValue);
            md5.Clear();
            string sTemp = "";
            for (int i = 0; i < bytHash.Length; i++)
            {
                sTemp += bytHash[i].ToString("X").PadLeft(2,'0');
            }
            return sTemp.ToLower();
        }

加盐就是在原来输入的密码后边再加一个比较复杂大字符串