C#陣列引數

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

namespace paraDemo
{
    class samplePar {
        public static string combine (params string[] substrings)
        {
            string result = string.Empty;
            foreach (string str in substrings)
                result = result + str;
            return result;
        }
       
    }
    class Program
    {
        
        static void Main(string[] args)
        {
            Console.WriteLine(samplePar.combine("hello", "world"));
            Console.WriteLine(samplePar.combine("123", "234", "345"));
           Console.ReadLine();

        }
    }
}