If FileName contains only a single L'\', return TRUE.\r
If FileName contains two adjacent L'\', return FALSE.\r
If FileName conatins L'/' , return FALSE.\r
- If FielName contains more than two dots seperated with other FileName characters\r
+ If FileName contains more than two dots separated with other FileName characters\r
by L'\', return FALSE. For example, L'.\...\filename.txt' is invalid path name. But L'..TwoDots\filename.txt' is valid path name.\r
\r
@param FileName The File Name String to check.\r