what is difference in content of image object and image raw data - c++

Question

I want to send an image over UDP network in small packets of size 1024 bytes.
i have two options.
imgBinaryFormatter->Serialize(memStream, objNewImage); // Sending an image object
OR
imgBinaryFormatter->Serialize(memStream, objNewImage->RawData); // Sending a raw data of image
what is difference in their content and when to use ?
For reference full function is given below
Image^ objNewImage = Image::FromFile(fullPath); // fullpath is full path of an image
MemoryStream^ memStream = gcnew MemoryStream();
Formatters::Binary::BinaryFormatter^ imgBinaryFormatter = gcnew Formatters::Binary::BinaryFormatter(); // Binary formatter
imgBinaryFormatter->Serialize(memStream, objNewImage); // Or objNewImage->RawData ??
arrImgArray = memStream->ToArray(); // COnvert stream to byte array
int iNoOfPackets = arrImgArray->Length / 1024;
int i;
for (i = 1; i < iNoOfPackets; i++){
socket->SendTo(arrImgArray, 1024*(i-1), 1024, SocketFlags::None, receiversAdd);
}
int remainedBytes = arrImgArray->Length - 1024 * iNoOfPackets;
socket->SendTo(arrImgArray, 1024 * iNoOfPackets, remainedBytes, SocketFlags::None, receiversAdd);
If you find improvements in code, feel free to edit code with suitable solution for memory constraint application.

Answer 1

It's better to use
the Image.Save Method (Stream, ImageFormat) for serialization into a Stream
and
the Image.FromStream Method (Stream) for deserialization from a Stream
or one of their overloads