using System;

using System.Collections.Generic;

using System.Globalization;

using System.Linq;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        //var val = Math.Round( 3.455,2, MidpointRounding.AwayFromZero);

        var valuees = new List<string>(){"www.come.com","www.come.comso;2,44","www.cosss.com:111","www.dsadsd.ccc;123.456789"};

        //var splites = valuees.Split(';')[0];

        var something = DeserializeAdFormDomainList(valuees);

        foreach( var val in something){

                var valy = CheckIfBidMultiplierKeyIsValidDomain(val.Key);

            if(valy)

            Console.WriteLine(valy + " " + val.Key + " value : "+ val.Value.ToString());

            else 

            Console.WriteLine("not - " + valy + " " + val.Key + " value : "+ val.Value.ToString());

        }

    }

    private static bool CheckIfBidMultiplierKeyIsValidDomain(string input)

        {

            var isDomain = Regex.IsMatch(input, @"^([a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,}$");

            return isDomain;

        }

    private static Dictionary<string, float?> DeserializeAdFormDomainList(List<string> domainList)

        {

            var domainListDictionary = domainList.ToDictionary(k => k.Split(';')[0], v =>

            {

                var domainHasValue = v.IndexOf(";", StringComparison.Ordinal);

                if (domainHasValue <= 0)

                    return null;

​

                var value = v.Split(';')[1];

                return (float?)float.Parse(value, CultureInfo.InvariantCulture);

            });

​

            return domainListDictionary;

        }

}