Update C# and VB project files to only copy files to the output if the file has changed

PreserveNewest in .net project files

My C# and VB.net project files contain many lines 
<CopyToOutputDirectory>Always</CopyToOutputDirectory>
and I want them to say
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>

so the gist of it is 

find -regex '.*\.vbproj\|.*\.csproj' -exec sed --in-place --binary 's:<CopyToOutputDirectory>Always</CopyToOutputDirectory>:<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>:' {} \;

Explaination:
find        Finds files
-regex      search by expression, this isn't the same regex as grep tho so watch out!
-exec       will execute the given command with {} substituted with each of the file names
\;          ends the -exec command with substituting one file name at a time
sed         Steam EDitor
--in-place  edit the files inplace (makes a backup if suffix supplied)
--binary	  Using Mingw on windows so this flag is required to corretly handle the end of line characters
s:old:new:  substitue command