C# 如何用多個字符串來切分字符串並去除空格

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

namespace Study
{
    public static class Program3
    {
        static void Main(string[] args)
        {
            Proccess(@"13212345671,13312345672,  13412345674
            13212345674,");
            Proccess("");
            Proccess(null);
            Console.Read();
        }

        public static void Proccess(string str)
        {
            //雙問號保證 null 值不會異常
            //StringSplitOptions.RemoveEmptyEntries 會移除 string.Empty 空串, 但對於空格無能為力
            //' '將按空格來切分，所以不再有空格出現
            string[] arr = (str ?? string.Empty).Split(new char[] { ',', '\t', '\n', ' ' }, StringSplitOptions.RemoveEmptyEntries);
            Console.WriteLine("本次切分后數組的長度為：{0}", arr.Length);
            int i = 1;
            foreach (string s in arr)
            {
                Console.WriteLine("{0}:{1}", (i++).ToString(), s);
            }
        }
    }
}