using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?:(?:25[0-5]|(?:2[0-4]|1[0-9]|[1-9]|)[0-9])(?:\.(?!$)|$)){4}";
string input = @"validates:
0.0.0.0:0
255.0.0.0
192.168.1.0:8080
does not validate:
192.168.0.0/24
192.168..1
192.168.1";
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