>>Are you sure that works. lcIP may be set multiple times and you will return just the last one. Is that what you want ?
>
>Isn't InterNetwork the primary address? If not, based on that, what would you recommand to make sure we get the primary address?

Not sure what you mean by 'primary' address. On my machine your code (or, at least, my Linq version of it) returns 4 IP4 addresses, two for wireless and two for Ethernet. Don't see any way to distinguish which one you might be looking for.....