using System;

using System.Collections.Generic;

using System.Text.RegularExpressions;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var input = "1,\"TEST\",22345,\"18,95\", Ab\"cde,1,2,,4";

        List<string> results = Regex.Matches(input, @"""(?<value>.*?)""|(?<value>[^,]*)")

            .Cast<Match>()

            .Select(m => m.Groups["value"].Value)

            .ToList();

        results.ForEach(r => Console.WriteLine(r));

    }

}