using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?<!\S)(?:(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9]?[0-9])\.){3}(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9]?[0-9])(?!\S)";
string input = @"1.1.1.1 kaseroi 1.1.1.1 jsoiu 1.1.1.1
1
1
11
123
132132.23213.213213.123213
23.23.23.23 2321321.33.3.3.3 3.3..3.3.3.3.3.
3.3.3.3.3.3
3.3.3.3
34.5.6.7
agdi 123213.44.4.5 12.12.12.12";
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