Is there an easy way (like via a .Net library) that allows me to get the IP address and subnet mask of the local machine that the application is running on?

I was trying to figure out how to do this myself, but then I thought "hey, I bet some Arsian has done this." I have a spreadsheet with a bunch of IP addresses in a single column. I'd like to make ...

DHCP is commonly deployed on a server to deliver IP addresses, subnet masks, default gateways, and DNS server information, but DHCP can also be deployed on switches and routers including Cisco’s ...