using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?:(?:ftp|https?):\/\/|mailto:)(?:\w+(?::\w+)?@)?(?:(?:[a-zA-Z\-][\w+-\.]*)|(?:[\d\.]+))(?:\/\w[\w\.\/%]+)?(?:\?(?:\w+=\w+(?:&\w+=\w+)+))?(?:#\w+)?";
string input = @"ftp://sub.domain
mailto:example@example.com
http://127.0.0.1/index.htm
https://user:password@s--ub.do_main.com/path%20/to/whatever.html?key1=value1&key2=value2#fragment";
foreach (Match m in Regex.Matches(input, pattern))
{
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