Reads a byte from the underlying stream and returns the byte cast to an int, or returns -1 if reading from the end of the stream.
Assembly: mscorlib (in mscorlib.dll)
The default implementation on Stream creates a new single-byte array and then calls Read. While this is formally correct, it is inefficient. Any stream with an internal buffer should override this method and provide a much more efficient version that reads the buffer directly, avoiding the extra array allocation on every call.