powershell - Find specific extension from directory -

i have root directory contains several child directories , inside 1 of them have .ps1 file want get:

function getfilenames {     $folders = get-childitem "c:\myfolder"     $filename = [system.io.directory]$folders[0].getfiles($folders[0].fullname, "*.ps1", "alldirectories") } 

so inside path: c:\myfolder have several folders , want take first folder , inside folder find .ps1 file. $filename value empty.

you can select first item , call get-childitem cmdlet again:

function getfilenames {     get-childitem "c:\myfolder" -directory |          select -first 1 |          get-childitem -filter '*.ps1' -recurse |          select -expand name } 

but looks little bit awkward me. wan't achieve?