Question: Find the file in the specified path

Question

How do I get the files that have .cpv extension in my path:

\\S3A601\ftp@secretaria\bank\Exit_SDPJ\test

 

How to adapt in my code?

 

Here's my code:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.ServiceProcess;
using System.Text;
using System.Threading.Tasks;
using System.Timers;

namespace ServicoProcessamentoComprovantes
{
    public partial class Service1: ServiceBase
    {
        private Timer timer1 = null;
        public Service1 ()
        {
            InitializeComponent ();
        }

        protected override void OnStart (string [] args)
        {
            StreamWriter write = new StreamWriter (@ "c: \ ServiceBanestes.txt", true);
            write.WriteLine ("Service started:" + DateTime.Now.ToString ());
            write.Flush ();
            write.Close ();
        }
        protected override void OnStop ()
        {
            StreamWriter write = new StreamWriter (@ "c: \ ServiceBanestes.txt", true);
            write.WriteLine ("Process Stopped:" + DateTime.Now.ToString ());
            write.Flush ();
            write.Close ();
        }
    }
}