Simple random password generator

Get-RandomPassword.ps1

function Get-RandomPassword {
    [CmdletBinding()]
    param(
        [Parameter(Mandatory = $true)]
        [ValidateRange(8, 64)]
        [int]$Length
    )
    
    $alphabet = 
        [char[]]'!@#$%^&*+?' +
        [char[]]'0123456789' +
        [char[]]'abcdefghijklmnopqrstuvwxyz' +
        [char[]]'ABCDEFGHIJKLMNOPQRSTUVWXYZ'

    -join (Get-Random -InputObject $alphabet -Count $Length | % { [char]$_ })
}