You guys are making this hideously complicated, when it’s really simple:
Copy-Item C:\Code\Trunk -Filter *.csproj.user -Destination C:\Code\F2 -Recurse
Will copy the Directory, creating a “Trunk” directory in F2. If you want to avoid creating the top-level Trunk folder, you have to stop telling PowerShell to copy it:
Get-ChildItem C:\Code\Trunk | Copy-Item -Destination C:\Code\F2 -Recurse -filter *.csproj.user