Recently I wrote a .NET based Akismet API component for Subtext. In attempting to make as clean as interface as possible, I made the the type of the property to store the commenter’s IP address of type IPAddress. This sort of falls in line with the Framework Design Guidelines, which mention using the Uri class in your public interface rather than a string to represent an URL. I figured this advice equally applied to IP Addresses as well. To obtain the user’s IP Address, I simply used the UserHostAddress property of the HttpRequest object like so. HttpContext.Current.Request.UserHostAddress
The UserHostAddress property is...