有关double数值应该注意的细节

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

namespace Form
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("{0,4} :-> {1}", Convert.ToInt32(1.048), 1.048.ToString().Length);//1 :-> 5
            Console.WriteLine("{0,4} :-> {1}", Convert.ToInt32(1.409), 1.409.ToString().Length);//1 :-> 5
            Console.WriteLine("{0,4} :-> {1}", Convert.ToInt32(1.50), 1.50.ToString().Length);//2 :-> 3
            Console.WriteLine("{0,4} :-> {1}", Convert.ToInt32(0.51), 0.51.ToString().Length);//1 :-> 4

            Console.ReadKey();
        }
    }
}