b617: FILE_BIN: reading whole file fails??

[Carl Schreiber]

This I read in the reference:

string  FileReadString(
   int  file_handle,     // File handle
   int  length=-1        // Length of the string
   );

...
When reading from a bin-file. the length of a string to read must be specified. 
When reading from a txt-file the string length is not required, 
and the string will be read from the current position to the line feed character "\r\n". 
When reading from a csv-file, the string length isn't required also, 
the string will be read from the current position till the nearest delimiter 
or till the text string end character.

Ok, now I want to read my file in the whole and I write:

        int handle, szFile, noLines;
        string strFile, arrFile[];
        handle = FileOpen(fName, FILE_SHARE_READ | FILE_READ | FILE_BIN);
        szFile = FileSize(handle);
        strFile = FileReadString(handle, szFile);
        noLines = StringSplit(strFile,"\n",arrFile);
        Print("My File with 20 lines and 2k has now ",noLines," Line?? FileSize: ",szFile);
I get:
 2014.03.20 15:09:42.509	test EURUSD,M1: My File with 20 lines and 2k has now 1 Line?? FileSize: 2048

Is that intended?

Beside that I would appreciate if the variable types of FileSize (ulong) and the length (int) to read would match:

ulong  FileSize(
   int  file_handle    // File handle
   );
..
int  FileWriteString(
   int           file_handle,    // File handle
   const string  text_string,    // string to write
   int           length=-1       // number of symbols
   );

You may set as default (read all or do not use) the max of ulong?