This is a little more tricky than I first imagined. I'm trying to read n bytes from a stream.
The MSDN claims that Read does not have to return n bytes, it just must return at least 1 and up to n bytes, with 0 bytes being the special case of reaching the end of the stream.
Typically, I'm using something like
var buf = new byte[size];
var count = stream.Read (buf, 0, size);
if (count != size) {
buf = buf.Take (count).ToArray ();
}
yield return buf;
I'm hoping for exactly size
bytes but by spec FileStream would be allowed to return a large number of 1-byte chunks as well. This must be avoided.
One way to solve this would be to have 2 buffers, one for reading and one for collecting the chunks until we got the requested number of bytes. That's a little cumbersome though.
I also had a look at BinaryReader but its spec also does not clearly state that n bytes will be returned for sure.
To clarify: Of course, upon the end of the stream the returned number of bytes may be less than size
- that's not a problem. I'm only talking about not receiving n bytes even though they are available in the stream.
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