using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(((ftp|https?):\/\/)[\-\w@:%_\+.~#?,&\/\/=]+)|((mailto:)?[_.\w-]+@([\w][\w\-]+\.)+[a-zA-Z]{2,3})";
string input = @"The test has some url in the last. extract the text starting from https to the end of the string<br></br>https://xyz.com/index.html some text after http://www.ex.com/test.html there are still more text as like ftp://ftp.test.com , which is also matching. This is a mailto link mailto:guyfromchennai@gmail.com to which you can send mail to contact me.";
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