一种使用机器的NetBois 名字，产生注册码的方法

content
"using System.Security.Cryptography;
using System.Text;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;

//以下是用NetBois名产生一串机器码的代码

MD5CryptoServiceProvider provider1;
            byte[] array1;
            string text1;
            string text2;
            byte num1;
            byte[] array2;
            int num2;
            provider1 = new MD5CryptoServiceProvider();
            array1 = provider1.ComputeHash(Encoding.Default.GetBytes(Environment.MachineName));
            text1 = ""ENTOPYMICROSYSTEMSDEVINIMMUHENDISLIK231456789ACD23456789AEFABGHJKLMNPRSTUVWYZXAHMETALIAKKASHAKANESKICI"";
            text2 = string.Empty;
            array2 = array1;
            for (num2 = 0; (num2 < array2.Length); num2 = (num2 + 1))
            {
                num1 = array2[num2];
                text2 = string.Concat(text2, text1.Substring((num1 % text1.Length), 1));
            }
            this.txtMachineCode.Text = text2.Substring(0, 10); 

//以下是用上面的机器码结合姓名、公司、用户ID和注册类型产生注册码的方法
MemoryStream stream1;
            IFormatter formatter1;
            byte[] array1;
            RC2CryptoServiceProvider provider1;
            byte[] array2;
            byte[] array3;
            byte[] array4;
            ICryptoTransform transform1;
            CryptoStream stream2;
            num1 = 2;
            stream1 = new MemoryStream();
            formatter1 = new BinaryFormatter();
            formatter1.Serialize(stream1, this.txtMachineCode.Text);
            formatter1.Serialize(stream1, this.txtUserId.Text);
            formatter1.Serialize(stream1, cboLicenseType.SelectedIndex);
            formatter1.Serialize(stream1, txtUserName.Text);
            formatter1.Serialize(stream1, txtCompany.Text);
            formatter1.Serialize(stream1, System.DateTime.Now);
            array1 = stream1.ToArray();
            provider1 = new RC2CryptoServiceProvider();
            provider1.KeySize = 128;
            provider1.GenerateKey();
            provider1.GenerateIV();
            array2 = provider1.IV;
            array3 = provider1.Key;
            transform1 = provider1.CreateEncryptor();
            stream1 = new MemoryStream();
            stream2 = new CryptoStream(stream1, transform1, System.Security.Cryptography.CryptoStreamMode.Write);
            try
            {
                stream2.Write(array1, 0, array1.Length);
                stream2.FlushFinalBlock();
                array4 = stream1.ToArray();
 
            }
            finally
            {
                stream1.Close();
                stream2.Close();
 
            }
            stream1 = new MemoryStream();
            formatter1.Serialize(stream1, array4);
            formatter1.Serialize(stream1, array3);
            formatter1.Serialize(stream1, array2);
            this.txtLicenseCode.Text = Convert.ToBase64String(stream1.ToArray()); "