VS 2012 Best way to get public IP in IPV4 format

Dim IPV4AddressesV2 As IEnumerable(Of IPAddress) = _
Dns.GetHostEntry(Dns.GetHostName()).AddressList.Where( _
    Function(a As IPAddress) _
        Not a.IsIPv6LinkLocal _
        AndAlso Not a.IsIPv6Multicast _
        AndAlso Not a.IsIPv6SiteLocal _
        AndAlso Not a.IsIPv6Teredo _
        AndAlso Not a.IsIPv4MappedToIPv6)
 
MessageBox.Show(String.Join(Environment.NewLine, IPV4AddressesV2))

Dim IPV4AddressesV1 As IEnumerable(Of IPAddress) = _
Dns.GetHostEntry(Dns.GetHostName).AddressList.Where( _
    Function(IP As IPAddress) Regex.IsMatch(IP.ToString, "^(\d{1,3}\.){3}\d{1,3}$"))
 
MessageBox.Show(String.Join(Environment.NewLine, IPV4AddressesV1))