how to replace string in file using msbuild?

Question

I want to replace a string such \"how r u\" in file test.xml with a string \"i am fine\" in another file xy.xml.using regular expression in ms build.

ie i have to r

Answer 1

I ran the both replacements against same file that sits on a Unix drive and used the unc path to it \server\path...:

and the cs custom action above does not add the bom; however the FileUpdate did:

%head -2 branding.h branding2.h
==> branding.h <==
#/* branding.h
#** This file captures common branding strings in a format usable by both sed and C-preprocessor.

==> branding2.h <==
#/* branding.h
#** This file captures common branding strings in a format usable by both sed and C-preprocessor.

Thanks csharptest.net - I was doing doing exec's with perl subtitute commands for unix builds.