using System.Runtime.InteropServices ; public unsafe class Dog { 
public uint DogBytes, DogAddr; //设置加密狗字节长度和起始地址 public byte[] DogData; //设置数据的长度 public uint Retcode; [DllImport("Win32dll.dll", CharSet = CharSet.Ansi)] public static unsafe extern uint DogRead(uint idogBytes, uint idogAddr, byte* pdogData); [DllImport("Win32dll.dll", CharSet = CharSet.Ansi)] public static unsafe extern uint DogWrite(uint idogBytes, uint idogAddr, byte* pdogData); public unsafe Dog(ushort num) 
{ DogBytes = num; DogData = new byte[DogBytes]; //设置数据的长度 
} public unsafe void ReadDog() { fixed (byte* pDogData = &DogData[0]) { Retcode = DogRead(DogBytes, DogAddr, pDogData); //将数据读出加密狗 } } public unsafe void WriteDog() { fixed (byte* pDogData = &DogData[0]) { Retcode = DogWrite(DogBytes, DogAddr, pDogData); //将数据写入加密狗 } } }向加密狗里边写入数据:Dog d=new Dog(10);d.DogAddr=0;for(int i=0;i<d.DogData.length;i++)d.DogData[i]=i;d.WriteDog();
读取加密狗里边的数据:Dog d=new Dog(10);byte[] b;d.ReadDog();b=new byte[d.DogData.length];
for (int i=0;i<d.DogData.lengh;i++)b[i]=d.DogData[i];
extern:表明我们用到的该方法是在外部声明的,即该方法是在win32dll.dll程序集里边;
unsafe:表明该加密狗类是不安全的.
