powershell - Combine text from multiple files into a single file -


i'm trying create text file contains content of source code files concatenated. i've came following concise code:

get-childitem  -recurse mysourcepath -include "*.htm", "*.cs" | foreach-object  {get-content $_.fullname | add-content myfile.txt}

the problem is, after multiple files (hundreds or thousands), i'm starting following error:

add-content : process cannot access file 'myfile.txt' because being used process.

it seems concurrency issue , thought related pipelining mechanism, using foreach didn't solve problem.

what right way in powershell protect file multiple writes? there way still utilize pipeline?

as explained here, problem add-content, it

get-childitem $mysourcepath -recurse -include "*.htm", "*.cs" | get-content |  out-file -append myfile.txt    #short version gci -file $mysourcepath -recurse -include "*.htm", "*.cs" | gc >>  myfile2.txt

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