using System;
using System.IO;
using System.Text;
using System.Security;
using System.Web.Security;//这个命名空间明明有的,他还是报错..为什么啊?
using System.Security.Cryptography;

namespace Test
{
    public class Security
    {
        public string EncryptPassword(string PasswordString, string PasswordFormat)
        {
            string encryptPassword = null;
            if (PasswordFormat == "SHA1")
            {

                encryptPassword = FormsAuthorication.HashPasswordForStoringInConfigFile(PasswordString, "SHA1");
                
            }
            else if (PasswordFormat == "MD5")
            {
                encryptPassword =FormsAuthorication.HashPasswordForStoringInConfigFile(PasswordString, "SHA1");
            }
            return encryptPassword;
        }
    }
}
建一个项目,添加这个类,运行的时候报错...要怎么改才正确呢?谢谢!