using System;
using System.Linq;
using System.Text.RegularExpressions;

public class Test
{
	static string regExp = "(((?<x>(?=[,\\r\\n]+))|\"(?<x>([^\"]|\"\")+)\"|(?<x>[^,\\r\\n]+)),?)";
	
	public static void Main()
	{
		var line = ",\"clean text\",\"with,embedded,commas.\",\"with\"\"embedded\"\"double\"\"quotes\",,\"6.1\",";
		
		var vals= (from Match m in Regex.Matches(line, regExp, RegexOptions.ExplicitCapture) 
        		   select m.Groups[1].Value).ToArray();
	    
	    Console.WriteLine("<start>");
		foreach(var s in vals)
			Console.WriteLine(s);
	    Console.WriteLine("<end>");
	}
}