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

using CommunityToolkit.Diagnostics;

namespace ConsoleApp
{
    internal class Program
    {
        static void Main(string[] args)
        {
            string str = "";
            double a = 10.0;
            double b = 100;
            //确保str满足条件才能继续执行，不满足即抛出异常
            Guard.IsNotNullOrEmpty(str);//抛出异常
            Guard.IsLessThan(a,b);
        }
    }
}