Example Polyfill, for text parsing example please look at previous versions

NetTCPIP.Polyfill.ps1

If (-not (Get-Command Get-NetAdapter -ErrorAction SilentlyContinue)) {
    Function global:Get-NetAdapter {
        Begin {
            $x = Get-WmiObject -Class Win32_NetworkAdapter -Filter 'NetEnabled=true'
        }
    
        Process {
            ForEach ($Item in $x) {
                [PSCustomObject]@{
                                InterfaceName = $Item.Name
                                InterfaceDescription = $Item.Description
                                InterfaceIndex = $Item.InterfaceIndex
                                Status = 'Up'
                                MACAddress = $Item.MACAddress.Replace(':','-')
                                LinkSpeed = $Item.Speed
                }
            }
        }

        End {}

        End {}
    }
}

If (-not (Get-Command Get-NetIPAddress -ErrorAction SilentlyContinue)) {
    Function global:Get-NetIPAddress {
        Begin {
            $x = Get-WmiObject -Class Win32_NetworkAdapterConfiguration -Filter 'IPEnabled=true'
            [regex]$IPv4Match = '((1?\d\d?|2[0-4]\d|25[0-5])\.){3}(1?\d\d?|2[0-4]\d|25[0-5])'
            [regex]$IPv6Match = '\s*((([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:))|(([0-9A-Fa-f]{1,4}:){6}(:[0-9A-Fa-f]{1,4}|((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3})|:))|(([0-9A-Fa-f]{1,4}:){5}(((:[0-9A-Fa-f]{1,4}){1,2})|:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3})|:))|(([0-9A-Fa-f]{1,4}:){4}(((:[0-9A-Fa-f]{1,4}){1,3})|((:[0-9A-Fa-f]{1,4})?:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:))|(([0-9A-Fa-f]{1,4}:){3}(((:[0-9A-Fa-f]{1,4}){1,4})|((:[0-9A-Fa-f]{1,4}){0,2}:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:))|(([0-9A-Fa-f]{1,4}:){2}(((:[0-9A-Fa-f]{1,4}){1,5})|((:[0-9A-Fa-f]{1,4}){0,3}:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:))|(([0-9A-Fa-f]{1,4}:){1}(((:[0-9A-Fa-f]{1,4}){1,6})|((:[0-9A-Fa-f]{1,4}){0,4}:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:))|(:(((:[0-9A-Fa-f]{1,4}){1,7})|((:[0-9A-Fa-f]{1,4}){0,5}:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:)))(%.+)?\s*'
        }
    
        Process {
            ForEach ($Item in $x) {
                #IPv4
                If ($Item.IPAddress -match $IPv4Match) {
                    [PSCustomObject]@{
                                    IPAddress = [string]($Item.IPAddress -match $IPv4Match)
                                    InterfaceIndex = $Item.InterfaceIndex
                                    InterfaceAlias = $Item.Description
                                    AddressFamily = 'IPv4'
                    }
                }

                #IPv6
                If ($Item.IPAddress -match $IPv6Match) {
                    [PSCustomObject]@{
                                    IPAddress = [string]($Item.IPAddress -match $IPv6Match)
                                    InterfaceIndex = $Item.InterfaceIndex
                                    InterfaceAlias = $Item.Description
                                    AddressFamily = 'IPv6'
                    }
                }
            }
        }

        End {}
    }
}