using System;

using System.Text;

using System.Text.RegularExpressions;

using System.Linq;

public class Program

{

    public static void Main()

    {

        string input = "2,Ref1|2,Ref2|5.3,Ref3";

        string pattern = @"(^((\|){0,1})+([0-9]+)+[,]+([a-zA-Z]{3})+([0-9]{1})+((\|){0,1})+(.*))";

        MatchCollection matches = Regex.Matches (input, pattern);

        Console.WriteLine("{0} matches found in:\n   {1}", matches.Count, input);

         var t = Regex.Matches (input, pattern).Cast<Match>()

        .Select(m => m.Value)

        .ToArray();

        foreach(var r in t)

            Console.WriteLine(r);

    }

}