using System;
using System.Collections.Generic;
using System.Linq;
 
public class Test
{
    class Cardtable
    {
        public int id { get; set; }
        public string cardno { get; set; }
    }
 
	public static void Main()
	{
        List<Cardtable> cardtable = new List<Cardtable>();
 
        cardtable.Add(new Cardtable() { id = 1, cardno = "0001-1234-5678-9001" });
        cardtable.Add(new Cardtable() { id = 2, cardno = "0001-1234-5678-9002" });
 
        string search_string = "0001-1234-5678-9002";
        var result = from c in cardtable
                where c.cardno.Replace("-", "") == search_string.Replace("-", "")
                select c;
 
        foreach (Cardtable ct in result)
        {
            Console.WriteLine("{0}:{1}", ct.id, ct.cardno);
        }
	}
}

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