using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^(?P<scheme>http(?:s)?:\/\/)?(?P<www>www\d?\.)?(?P<domain>\b(?!www\d?\.)[a-z\d\-]+(?:\.[a-z\d\-]{2,})+)(?P<port>:\d{1,5})?(?P<path>\/(?:[-a-zA-Z0-9._~!$&\'()*+,;=:@]|%[0-9a-fA-F]{2})*)*(?P<query_fragm>[?#&][\/\_\-\&\%\?\#\+\=\.:a-zA-Z\d]*)*$";
string input = @"http://example.com
https://www.example.com
http://example.com/path
https://www.example.com/path
http://example.com/path?query=1
https://www.example.com/path?query=1
http://example.com/path#fragment
https://www.example.com/path#fragment
http://example.com:8080
https://www.example.com:8080
http://subdomain.example.com
https://www.subdomain.example.com
http://subdomain.example.com/path
https://www.subdomain.example.com/path
http://subdomain.example.com/path?query=1
https://www.subdomain.example.com/path?query=1
http://subdomain.example.com/path#fragment
https://www.subdomain.example.com/path#fragment
http://subdomain.example.com:8080
https://www.subdomain.example.com:8080
http://example.org
https://www.example.org
http://example.org/path
https://www.example.org/path
http://example.org/path?query=1
https://www.example.org/path?query=1
http://example.org/path#fragment
https://www.example.org/path#fragment
http://example.org:8080
https://www.example.org:8080
http://subdomain.example.org
https://www.subdomain.example.org
http://subdomain.example.org/path
https://www.subdomain.example.org/path
http://subdomain.example.org/path?query=1
https://www.subdomain.example.org/path?query=1
http://subdomain.example.org/path#fragment
https://www.subdomain.example.org/path#fragment
http://subdomain.example.org:8080
https://www.subdomain.example.org:8080
http://example.net
https://www.example.net
http://example.net/path
https://www.example.net/path
http://example.net/path?query=1
https://www.example.net/path?query=1
http://example.net/path#fragment
https://www.example.net/path#fragment
http://example.net:8080
https://www.example.net:8080";
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