Joining array variable to create a path

Hi,
I would like merging 3 variables and using it to copy a file. What am I missing?
set-variable -name ModuleVariables -visibility public -Scope Script -Value @("\Trousse\Modules","Variables.psm1")
set-variable -name $PCompletTrousse -visibility public -Scope Script -Value "C:\Temp\ShockwavePlayer10_Frv1"
set-variable -name ScriptDir -visibility public -Scope Script -Value "C:\Temp\Logiciels\Scripts Powershell\_!NTrousses1.0_Frv1"
Copy-Item "$ScriptDir+$ModuleVariables[0]+$ModuleVariables[1]" -Destination $PCompletTrousse
Thanks,
François

Hi,
I just found this would work too:
Copy-Item (Join-Path -path (Join-Path $ScriptDir -ChildPath $ModuleVariables[0]) -childpath $ModuleVariables1]) -Destination $PCompletTrousse
Not sure to understand the difference between your solution and mine. Which one is better?
Thanks,
François
Both make calls out to another function or cmdlet. The issue is that the '+' to combine strings must exist outside the strings to combine. For example:
$a = "adam"
$b = "bob"
$c = "$a+$b"
# $c now has a value of "adam+bob"
$d = $a + $b
# $d now had a value of "adambob"
Combining the strings outside of a function call or cmdlet would probably be a little faster, but negligible depending on the number of times you do it.

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