字节转化为结构体BytesToStruct

//结构体转字节数组
    public byte[] StructToBytes (object structObj)
    {
        
        int size = Marshal.SizeOf (structObj);//获取结构体的大小
        IntPtr buffer = Marshal.AllocHGlobal (size);//分配内存
        try {
            Marshal.StructureToPtr (structObj, buffer, false);//将数据从托管对象封装到非托管内容并不销毁旧物体
            byte[] bytes = new byte[size];
            Marshal.Copy (buffer, bytes, 0, size);//将数据从非托管内存复制到数组内
            return   bytes;
        } finally {
            Marshal.FreeHGlobal (buffer);//释放内存
        }
    }

//字节转结构体
    public object BytesToStruct (byte[] bytes, Type   strcutType)
    {
        int size = Marshal.SizeOf (strcutType);
        IntPtr buffer = Marshal.AllocHGlobal (size);
        try {
            Marshal.Copy (bytes, 0, buffer, size);
            return  Marshal.PtrToStructure (buffer, strcutType);
        } finally {
            Marshal.FreeHGlobal (buffer);
        }   
        
    }