Is Ip Address By Regular Expression
using System.Text.RegularExpressions; public static class Validate { public static bool IsIpAddress(string value) { if (string.IsNullOrEmpty(value)) return false; Regex ipAddress = new Regex(@"^([1-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])(\.([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])){3}$", RegexOptions.Compiled | RegexOptions.IgnoreCase); return ipAddress.IsMatch(value); } }