查找区配的订单号

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using ConsoleApplicationDemo.Geometric;

namespace ConsoleApplicationDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            List<string> list = new List<string>() {
                "XS443694739104075776","","YP443694739104075776"
            };

            var tList = new List<string>();

            foreach (var item in FilterPrefixOrderNoList)
            {
                foreach (var co in list)
                {
                    if (!string.IsNullOrEmpty(co) && co.Length >= item.Length && item == co.Substring(0, item.Length))
                    {
                        tList.Add(co);
                    }
                }
            }


            //输出
            foreach (var rst in tList)
            {               
                Console.WriteLine(rst);
            }
        }

        public static string[] FilterPrefixOrderNoList = { "TS", "XS", "YP" };
    }

}

foreach (var item in FilterPrefixOrderNoList)
            {
                foreach (var co in list)
                {
                    // if (!string.IsNullOrEmpty(co) && co.Length >= item.Length && item == co.Substring(0, item.Length))

                    if (co.StartsWith(item))
                    {
                        tList.Add(co);
                    }
                }
            }