Three different versions of the program created:

v.1. Using XMLTextReader/XMLTextWriter

-open given file for read

-search “xmlns=” replace by “aaans=”

- write changes to the temp file

- remove source file, move output

Time of processing 951mb file:  0:03:05:17

v.2. Using Filestream /StreamReader/StreamWriter

-open given file for ( Read more... )