Read entire contents of file name and returns it as an untyped array. If the file size is larger than upTo, only upTo bytes are _read.
if present, the maximum number of bytes to _read
Untyped array of bytes _read
FileException in case of error
See Implementation
Read entire contents of file name and returns it as an untyped array. If the file size is larger than upTo, only upTo bytes are _read.