PS C:
powershell> $chs=@("A","B","C")
PS C:Powershell> $chsBak=$chs
PS C:Powershell> $chsBak[1]="H"
PS C:Powershell> $chs
A
H
C
PS C:Powershell> $chs.Equals($chsBak)
True
PS C:Powershell> $chsNew=$chs.Clone()
PS C:Powershell> $chsNew[1]="Good"
PS C:Powershell> $chs.Equals($chsNew)
False
PS C:Powershell> $chs
A
H
C