Convert Decimal To Roman using Dictionary

namespace CSharpPractice
{
    class Class1
    {
        public static void RomanDecimalConvertor(int num)
        {
            Dictionary<int, string> roman = new Dictionary<int, string>
                                                            {
                                                             {1,"I"}, {4,"IV"},
                                                             {5,"V"}, {9,"IX"},
                                                             {10,"X"}, {40,"XL"},
                                                             {50,"L"}, {90,"XC"},
                                                             {100,"C"}, {400,"CD"},
                                                             {500,"D"}, {900,"CM"},
                                                             {1000,"M"}
                                                            };
            int divisor = 0, times = 0;
            while(num!=0)
            {

                foreach (int key in roman.Keys)
                {
                    if (key > num)
                        break;
                    divisor = key;
                }
                times = num / divisor;
                for (int i = 1; i <= times; i++)
                {
                    Console.Write(roman[divisor]);
                }
                num = num % divisor;

            }
        }
    }
}



namespace CSharpPractice
{
    class Program
    {
        static void Main(string[] args)
        {
            Class1.RomanDecimalConvertor(1500);
            Console.Read();
        }
    }
}