C#: interconversion between bytes and struct

bytes_struct.cs

        protected static TStruct BytesToStruct<TStruct>(byte[] bs, int bs_length) where TStruct : new()
        {
            int typeLen = Marshal.SizeOf(typeof(TStruct));
            IntPtr tmp = Marshal.AllocHGlobal(typeLen);     // 分配托管内存
            Marshal.Copy(bs, 0, tmp, bs_length);            // 将字节复制到托管内存
            TStruct rv = (TStruct)Marshal.PtrToStructure(tmp, typeof(TStruct));
            Marshal.FreeHGlobal(tmp);   // 释放托管内存

            return rv;
        }

        protected static bool StructToBytes<TStruct>(TStruct _struct, byte[] buffer)
        {
            int typeLen = Marshal.SizeOf(typeof(TStruct));
            if (buffer.Length < typeLen)
            {
                return false;
            }

            IntPtr tmp = Marshal.AllocHGlobal(typeLen);
            Marshal.StructureToPtr(_struct, tmp, false);
            Marshal.Copy(tmp, buffer, 0, typeLen);
            Marshal.FreeHGlobal(tmp);

            return true;
        }