using System;  using System.Text;  using System.Security.Cryptography;  namespace DotNet.Utilities  {      /// <summary>      /// 得到随机安全码（哈希加密）。      /// </summary>      public class HashEncode      {          public HashEncode()          {              //              // TODO: 在此处添加构造函数逻辑              //          }          /// <summary>          /// 得到随机哈希加密字符串          /// </summary>          /// <returns></returns>          public static string GetSecurity()          {                        string Security = HashEncoding(GetRandomValue());                    return Security;          }          /// <summary>          /// 得到一个随机数值          /// </summary>          /// <returns></returns>          public static string GetRandomValue()          {                        Random Seed = new Random();              string RandomVaule = Seed.Next(1, int.MaxValue).ToString();              return RandomVaule;          }          /// <summary>          /// 哈希加密一个字符串，sharejs.com          /// </summary>          /// <param name="Security"></param>          /// <returns></returns>          public static string HashEncoding(string Security)          {                                    byte[] Value;              UnicodeEncoding Code = new UnicodeEncoding();              byte[] Message = Code.GetBytes(Security);              SHA512Managed Arithmetic = new SHA512Managed();              Value = Arithmetic.ComputeHash(Message);              Security = "";              foreach(byte o in Value)              {                  Security += (int) o + "O";              }              return Security;          }      }  }