using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SplitLINQTest
{
    class Program
    {
        static void Main(string[] args)
        {
            var rates = "50.8,10,1;0.0001,60,0;50,0,0;";
            var OpenDate = DateTime.Parse("01.04.2014");
            var res =
                string.Join("\n",
                    from parts in rates.Split(new[] {';'}, StringSplitOptions.RemoveEmptyEntries)
                                       .Select(p => p.Split(',').Select(double.Parse).ToList())
                    let date = OpenDate.AddDays(parts[1])
                    let output = string.Format("{0}\t{1:d}", parts[0], date)
                    orderby parts[2] descending
                    select output);
            Console.WriteLine(res);
        }
    }
}