using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?:For:\s)?(?:For:.+)?((?<first_ip>\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}))\,";
string input = @"For: ${jnd:ldap://${namingDetails}.for.net.sh}, 4.5.3.2, 23.200.06.110 V-
For: 10.10.21.17, 5.18.11.74, 23.36.3.22 V-
For: 23.3.39.1, 21.61.39.21 V-
For: 3.3.39.1 V-";
RegexOptions options = RegexOptions.Multiline;
foreach (Match m in Regex.Matches(input, pattern, options))
{
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