Arrays Gone Astray

I love powershell, and as one figures you’ll have to deal with arrays. and when you learn them, they become a handy tool for any dev/scripters toolkit.
This guy covers it well. in short do this

PS C:\Scripts> $Fruit = @("Apple","Banna","Orange")
PS C:\Scripts> $Fruit.Add("Kiwi")
Exception calling "Add" with "1" argument(s): "Collection was of a fixed size."
At line:1 char:1
+ $Fruit.Add("Kiwi")
+ ~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : NotSupportedException

PS C:\Scripts> $Fruit = $Fruit + "Kiwi"
PS C:\Scripts> $Fruit
Apple
Banna
Orange
Kiwi
PS C:\Scripts> $Fruit.GetType()

IsPublic IsSerial Name                                     BaseType
-------- -------- ----                                     --------
True     True     Object[]                                 System.Array


PS C:\Scripts> $Fruit = $Fruit - "Kiwi"
Method invocation failed because [System.Object[]] does not contain a method named 'op_Subtraction'.
At line:1 char:1
+ $Fruit = $Fruit - "Kiwi"
+ ~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (op_Subtraction:String) [], RuntimeException
    + FullyQualifiedErrorId : MethodNotFound
PS C:\Scripts> $Fruit = $Fruit -ne "Kiwi"
PS C:\Scripts> $Fruit
Apple
Banna
Orange
PS C:\Scripts> $FruitIsFixedSize
PS C:\Scripts> $Fruit.IsFixedSize
True