C#正则表达式之Ismatch()的用法解读

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
namespace Regular
{
    class Program
    {
        static void Main(string[] args)
        {
            Regex mRegular = new Regex("a[bcd]c", RegexOptions.ExplicitCapture);
            //IsMatch拥有静态和非静态的几种重载方法；
            //如果正则表达式只使用一次，使用静态方法更好！
            string str = "abc acc";
            Console.WriteLine(mRegular.IsMatch(str));
            string str2 = "Welcome to verison-fios!";
            Console.WriteLine(Regex.IsMatch(str2,"Me T",RegexOptions.IgnoreCase));
            Console.ReadKey();
        }
    }
}

regexString= @"^(0|1000|([1-9]\d{0,2}))$"

regexString = @"^((\d|[1-9]\d)(\.\d{1,3})?)|100$";//[0,100] 包括小数点后三位

 static void Main(string[] args)
        {
            string regexString;
            //regexString = @"^(0|1000|([1-9]\d{0,2}))$";
            regexString = @"^((\d|[1-9]\d)(\.\d{1,3})?)|100$";//[0,100] 包括小数点后三位
            for (double i = 0; i < 100; i = i + 0.001)
            {
                var str = Math.Round(i, 3).ToString();
                bool mathResult = Regex.IsMatch(str, regexString);
                if (!mathResult)
                {
                    Console.WriteLine(str);
                }
            }
            Console.WriteLine("Match Complete!");
            Console.ReadKey();
        }