C#语言学习--基础部分(二二)ExtensionsMethods

Programm.cs

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

namespace ExtensionsMethods
{
    class Program
    {
        static void DoWork()
        {
            int x = 591;
            for (int i = 2; i <= 10; i++)
            {
                Console.WriteLine("{0} in base {1} is {2}",x,i,x.ConvertToBase(i));
            }
        }
        static void Main(string[] args)
        {
            try {
                DoWork();
            }catch(Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }
    }
}

 Util.cs

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

namespace ExtensionsMethods
{
   static class Util
    {
        public static int ConvertToBase(this int i, int baseToConvertTo)
        {
            if (baseToConvertTo < 2 || baseToConvertTo > 10)
            {
                throw new ArgumentException("Value cannot be converted to base"+baseToConvertTo.ToString());
            }
            int result = 0;
            int iterations = 0;
            do
            {
                int nextDigit = i % baseToConvertTo;
                i /= baseToConvertTo;
                result += nextDigit * (int)Math.Pow(10, iterations);
                iterations++;
            } while (i != 0);
            return result;
        }
    }
}