为啥我用MD5加密后的密文全部是数字？
为啥我用MD5加密后的密文全部是数字？好像跟一般的MD5加密网站的密文不同啊，我的加密方法C#代码如下，请问要怎么改？
public string GetMD5(string strpwd)
  {

  MD5 md5 = new MD5CryptoServiceProvider(); //加密服务提供类
  byte[] bPwd = Encoding.Default.GetBytes(strpwd); //将输入的密码转换成字节数组
  byte[] bMD5 = md5.ComputeHash(bPwd); //计算指定字节数组的哈希值
  md5.Clear(); //释放加密服务提供类的所有资源
  StringBuilder sbMD5Pwd = new StringBuilder();
  for (int i = 0; i < bMD5.Length; i++) //将加密后的字节转换成字符串
  {
  sbMD5Pwd.Append(bMD5[i].ToString());
  }
  return sbMD5Pwd.ToString();
  }

------解决方案--------------------

C# code

    Winform:  
    public static string StringToMD5Hash(string inputString)    
    {    
        MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();    
        byte[] encryptedBytes = md5.ComputeHash(Encoding.ASCII.GetBytes(inputString));    
        StringBuilder sb = new StringBuilder();    
        for (int i = 0; i < encryptedBytes.Length; i++)    
        {    
            sb.AppendFormat("{0:x2}", encryptedBytes[i]);    
      
        }    
        return sb.ToString();    
    }   
      
    Webform:  
    public static string md5(string pwd)    
      
    {    
        string md5pwd = FormsAuthentication.HashPasswordForStoringInConfigFile(pwd, "MD5");    
        return md5pwd;    
    }