Page count

Below is code I am using to get page counts of txt files.   The line char count can only be 132 char, the total lines per page is 68, there is a char  112 for form feed and a char 10  and could be char 13.

Using this code - I do not get an acurate count of pages.  And something else that is happening is that I will see different counts on different PC's.  Which does not make sense because the code is the same.

Is there a way to get an accurate count of pages????



public int GetPageCount()
{
      int nextChar;
      int charCount = 0;

      // These counts are initially 1
      int lineCount = 1;
      int pageCount = 1;

      System.IO.StreamReader streamReader = new System.IO.StreamReader(_filePath);
      while (streamReader.Peek() > -1)
      {
            nextChar = streamReader.Read();
            charCount ++;

            // Check for form feed (12) or 68 lines
            if (nextChar == 12 || lineCount == 68)
            {
                  pageCount++;
                  lineCount = 0;
                  charCount = 0;
                  continue;
            }

            // Check for a newLine (10) or 132 characters
            else if(nextChar == 10 || charCount == 132)
            {
                  lineCount++;
                  charCount = 0;
                  continue;
            }
      }

      // Close StreamReader
      streamReader.Close();

      // Increment pageCount by one before returning it's value
      return pageCount;
}