using System;
using System.Text.RegularExpressions;
using System.Linq;
public class Test
{
	public static void Main()
	{
		//var inputString="This is Test page <a href='test.aspx'>test page</a>"
    	//var inputString="This is Test page <a href='test1.aspx'>test</a> another one <a href='test2.aspx'>test</a>"
    	//var inputString="This is Tests\"s page <a href='test1.aspx'>test</a> another one <a href='test2.aspx'>test</a>"
    	//var inputString="This is Test page"
    	//var inputString="This is Test page\"s without problem"
		var inputString="This string create \"problem\" for me";    
		var regex=new Regex("<a [^>]*href=(?:'(?<href>.*?)')|(?:\"(?<href>.*?)\")",RegexOptions.IgnoreCase);    
		var urls=regex.Matches(inputString).OfType<Match>().Select(m =>m.Groups["href"].Value);    
		foreach(var zzzzzzz in urls){
  			Console.WriteLine(zzzzzzz);
		}
	}
}