C# の構造とバイト変換

 C#で上位計算機を開発する場合、バイトストリームと構造体の変換が必要となる場合が多いですが、以下のコードは構造体とバイトの変換のサンプルコードです。

        public static byte[] StructToBytes<T>(T obj)
        {
            int size = Marshal.SizeOf(typeof(T));
            IntPtr bufferPtr = Marshal.AllocHGlobal(size);
            try
            {
                Marshal.StructureToPtr(obj, bufferPtr, false);
                byte[] bytes = new byte[size];
                Marshal.Copy(bufferPtr, bytes, 0, size);
                return bytes;
            }
            catch (Exception ex)
            {
                throw new Exception("Error in StructToBytes ! " + ex.Message);
            }
            finally
            {
                Marshal.FreeHGlobal(bufferPtr);
            }
        }

        public static object BytesToStuct(byte[] bytes, Type type)
        {
            //得到结构体的大小
            int size = Marshal.SizeOf(type);
            //byte数组长度小于结构体的大小
            if (size > bytes.Length)
            {
                //返回空
                return null;
            }
            //分配结构体大小的内存空间
            IntPtr structPtr = Marshal.AllocHGlobal(size);
            //将byte数组拷到分配好的内存空间
            Marshal.Copy(bytes, 0, structPtr, size);
            //将内存空间转换为目标结构体
            object obj = Marshal.PtrToStructure(structPtr, type);
            //释放内存空间
            Marshal.FreeHGlobal(structPtr);
            //返回结构体
            return obj;
        }

        public struct desc_info_t
        {
            public uint magic_num;    //allways be 0x20200710
            public uint size;         //file size
            public uint file_type;    //file type
            public uint method;       //(reserve)differential upgrade
            public uint chk_sum;      //check sum, for ota
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 28)]
            public byte[] device;   //device name, such as "UE-E210"
        }
        public struct header_t
        {
            public uint prefix;       //prefix: 0x20200655(LSB must 0x55)
            public uint ver;          //version of upgrade protocal
            public uint baudrate;     //auto switch baudrate
            public uint en_485;       //RS485 enable 0: disable 1: enable
            public uint broadcast;    //骞挎挱
            public desc_info_t info;         //file descriptor
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 60)]
            public byte[] path;
        }