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 read string from one file(xy.xml) and replace it in another file test.xml. so please provide necessary steps to solve this issue with example

question from:https://stackoverflow.com/questions/7837644/how-to-replace-string-in-file-using-msbuild

Answer 1

EDIT: This answer is obsolete. Use solution below...

Use ReadLinesFromFile task to get replacement string from the xy.xml file. Check this

Then use value from xy.xml as a replacement string for FileUpdate task. Check this

And put it all together ;)