using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"\b(?:(?:25[0-5]|2[0-4][0-9]|1?[1-9][0-9]?|10[0-9])(?:(?<!\.)\b|\.))(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(?:(?<!\.)\b|\.)){3}";
string input = @"Match on VALID IP address anywhere in string.
192.1683.0.1 1.1.1.256 3.2.6.2351 300.3.3.3 192.168.10.10 127.0.0.999
255.255.256.255 255.255.255.2555 100.0.0.1 1000.0.0.1
192.168.10.10
100.0.0.1";
foreach (Match m in Regex.Matches(input, pattern))
{
Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx