File and byte [] interchange in C #

[Question]: How can I convert images and sounds into byte [] and transmit them through webservice?
How can we convert byte [] transmitted by webservice into the desired file?
(1) converting a file to byte []
Method 1: Use MemoryStream (the data of MemoryStream comes from the memory buffer)
System. IO. MemoryStream m = new System. IO. MemoryStream ();
System. Drawing. Bitmap bp = new System. Drawing. Bitmap (pname );
Bp. Save (m, System. Drawing. Imaging. ImageFormat. Jpeg); // Save the image to the specified stream in the specified format.
Byte [] B = m. GetBuffer (); // read from memory buffer
Method 2: Use FileStream (the data of the FileStream object comes from the file)
FileStream stream = new FileInfo (path). OpenRead ();
Byte [] buffer = new Byte [stream. Length];
// Read the byte block from the stream and write the data into the given buffer.
Stream. Read (buffer, 0, Convert. ToInt32 (stream. Length ));
(2) Converting byte [] into a file
WebReference. MyService obj = new WebReference. MyService ();
Byte [] B = obj. downWav ("1001"); // 1001 pid of a record, returns the byte of the image in this record []
MemoryStream m = new MemoryStream (B );
String file = string. Format (@ "%0%e.wav ",
Path. GetDirectoryName (Assembly. GetExecutingAssembly (). GetName (). CodeBase ));
// Save the downloaded file in the current directory as e.wave. Of course, if the image is used, save it as a.jpg.
FileStream fs = new FileStream (file, FileMode. OpenOrCreate );
M. WriteTo (fs );
M. Close ();
Fs. Close ();
M = null;
Fs = null;