[font color=#FF0000][strong]//尊敬的老师，你好，我新建了一个类项目，生成dll文件，再新建一个widows窗体项目，引用该dll文件，资源管理器中双击该dll文件在对象浏览器中却看不到有方法，代码中也调用不到，请问这是什么原因呀？[/strong][/font]



using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.Security.Cryptography;   //加密解密用
using System.IO;                      //MemoryStream文件流用


namespace cls_encrypt
{
    class cls_encryptString
    {
        public string Encryp(string what)
        {

            string encryptKey = "secr";//加密key



            try
            {

                DESCryptoServiceProvider descsp = new DESCryptoServiceProvider();
                byte[] key = Encoding.Unicode.GetBytes(encryptKey);
                byte[] data = Encoding.Unicode.GetBytes(what.Trim());
                MemoryStream MStream = new MemoryStream();
                CryptoStream CStream = new CryptoStream(MStream, descsp.CreateEncryptor(key, key), CryptoStreamMode.Write);
                CStream.Write(data, 0, data.Length);
                CStream.FlushFinalBlock();
                return Convert.ToBase64String(MStream.ToArray());


            }
            catch
            {

                return string.Empty;

            }
        }




        public string Descryp(string what)            //有返回值的方法
        {
            string encryptKey = "secr";//解密key

            try
            {
                DESCryptoServiceProvider descsp = new DESCryptoServiceProvider();
                byte[] key = Encoding.Unicode.GetBytes(encryptKey);
                byte[] data = Convert.FromBase64String(what.Trim());
                MemoryStream MStream = new MemoryStream();
                CryptoStream CStream = new CryptoStream(MStream, descsp.CreateDecryptor(key, key), CryptoStreamMode.Write);
                CStream.Write(data, 0, data.Length);
                CStream.FlushFinalBlock();
                return Encoding.Unicode.GetString(MStream.ToArray());

            }
            catch
            {

                return string.Empty;
            }

        }

    }
}




[strong]//以下是新窗体项目代码[/strong]


using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

using cls_encrypt;//引用加密命名空间

namespace 调用加密类dll
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            Encryp Encryp = new Encryp("fdfds");
            textBox1.Text = Encryp;
        }
    }
}