Invalid IP

[C# Programming]

Hi, I built an application using a TCP/IP connection. Therefore I need an I.P. checker to make sure the given IP is correct. I noticed that when an invalid IP is provided the complier can tell it right away. SO my quesion is if there is a command to check if an IP address is valid. By valid I mean it is less than 255.255.255.255. Or if you happen to have a code that does it i would be greatful.
Thank you in advance http://www.barakasoft.com/script/Forums/Images/smiley_smile.gif