public override long GetKnownFileSize()
{
if (FileBytes != null)
{
return(FileBytes.Length);
}
#if USE_MEMORY_MAPPED_FILE
//return FileView.Capacity;
return(FileSize);
#elif USE_FILE_HANDLE
return(File.Length);
#elif USE_JAVA_FILEHANDLE
return(File != null?File.GetFileSize() : 0);
#else
return(FileBytes != null ? FileBytes.Length : 0);
#endif
}