using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;

public class Test
{
	public static void Main()
	{
		var text = "$(string1$(string2)$sometexthere$(string3$(string4)$texttext)$anothertext)$";
    	var pattern = @"(?=(?<result>\$\((?>[^()]+|(?<o>\()|(?<-o>\)))*(?(o)(?!))\)\$))";
		var results = Regex.Matches(text, pattern)
		        .Cast<Match>()
		        .Select(x => x.Groups["result"].Value)
		        .ToList();
        foreach (var s in results)
        	Console.WriteLine(s);
	}
}