I tried this code for validating IP address, but it doesn\'t work...
public static bool IP(string ipStr)
{
string pattern = @\"^([1-9]|[1-9][0-9]|1[0-9][
for match a valid IP adress use
^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$
instead of
^([01]?[0-9][0-9]?|2[0-4][0-9]|25[0-5])(\.([01]?[0-9][0-9]?|2[0-4][0-9]|25[0-5])){3}$
because many regex engine match the first possibility in the OR sequence
you can try your regex engine : 10.48.0.200
test the difference here