Checking if a Remote (HTTP) File Exists

If you are going to be performing any action on a file, you want to make sure the file exists first. This is easier for files stored locally on your machine where you can simply do a File.Exists call and...call it a day. Things are a little bit more tricky when you try to check if a remote file such as something on a HTTP server exists though. Given the nature of requests traveling over a network