using System;

using System.Text.RegularExpressions;

using System.Globalization;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        foreach(var d in GetPrices("28.54;0.17;1.72;2.92 руб./м2", out var postfix))

        {

            Console.WriteLine($"{d} {postfix}");

        }

    }

    public static decimal[] GetPrices(string rawValue, out string postfix)

    {

        postfix = null;

        if (string.IsNullOrWhiteSpace(rawValue)) return new decimal[0];

        var values = rawValue.Split(';');

        if (values.Length == 0) return new decimal[0];

​

        var r = new Regex(@"^(-?\s*\d+,?\d*),?(.*)$");

        var numValues = new List<decimal>();

        for (var i = 0; i < values.Length; i++)

        {

            var value = values[i].Trim('"');

            var match = r.Match(value.Replace('.', ','));

​

            if (match.Groups.Count == 3)

            {

                var parsedValue = decimal.Parse(match.Groups[1].Value.Replace(" ", ""), new CultureInfo(""));

                if (parsedValue != 0) numValues.Add(parsedValue);

                if (string.IsNullOrWhiteSpace(postfix)) postfix = match.Groups[2].Value.Replace(',', '.');

            }

            else if (!match.Success) postfix = value;

        }

        return numValues.ToArray();

    }

}