using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])\.){3}(25[0-4]|2[0-4][0-9]|1[0-9][0-9]|[0-9]?[1-9])";
string input = @"192.168.1.1
8.8.8.8
9.9.9.9
127.0.0.1
255.255.255.255 # can't end in 255, reserved for broadcast
0.0.0.0 # can't end in 0, i don't know what that's reserved for
0.0.0.1
";
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