Program works on Visual Studio but not work as ".exe"

Hello,
Im just working on a program that changes some row's values in an excel file. Program has just about 60 rows. When i debug my program at Visual Studio (pressing F5), its working properly and made some changes at excel file. Its ok. But when I only click my project's "excel.exe" file, it doesnt work properly. Its getting no error but it didnt any changes at this excel file. And i didnt move this "excel.exe" file to anywhere, i started it in projects folder.(/bin/debug)

 Its really weird and i didnt know what is the problem?

My all codes below;

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;

namespace badi
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }I

private void button1_Click(object sender, EventArgs e)
        {
            OleDbConnection baglanti = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=dosya.xlsx;Extended Properties=Excel 12.0 Xml;");
            baglanti.Open();
            string query = "SELECT [Ci Adi],[Baslangic Tarihi],[Bitis Tarihi],[Sira],[Kategori] FROM [Sheet6$A:L]";

            OleDbDataReader rdr;
            OleDbCommand komut = new OleDbCommand(query, baglanti);
            rdr = komut.ExecuteReader();

            while (rdr.Read())
            {
                DateTime tarih1_baslangic = DateTime.Parse(rdr["Baslangic Tarihi"].ToString());
                DateTime tarih1_bitis = DateTime.Parse(rdr["Bitis Tarihi"].ToString());

                string ci_adi = rdr["Ci Adi"].ToString();
                string query_ci = "SELECT [Ci Adi],[Baslangic Tarihi],[Bitis Tarihi],[Sira],[Kategori] FROM[Sheet6$A:L] WHERE [Ci Adi]='" + ci_adi + "'";
                OleDbDataReader rdr_ci;
                OleDbCommand komut_ci = new OleDbCommand(query_ci, baglanti);

                rdr_ci = komut_ci.ExecuteReader();
               
                while (rdr_ci.Read())
                {
                    string birincidongu = rdr_ci["Sira"].ToString();
                    string ikincidongu = rdr["Sira"].ToString();
                       
                    DateTime tarih2_baslangic = DateTime.Parse(rdr_ci["Baslangic Tarihi"].ToString());
                    DateTime tarih2_bitis = DateTime.Parse(rdr_ci["Bitis Tarihi"].ToString());

                    if (int.Parse(rdr_ci["Sira"].ToString()) != int.Parse(rdr["Sira"].ToString()))
                    {
                        if (int.Parse(rdr_ci["Sira"].ToString()) > int.Parse(rdr["Sira"].ToString()))
                        {
                            if (tarih1_baslangic > tarih2_baslangic && tarih2_bitis > tarih1_baslangic)
                            {
    
                                OleDbCommand komut_ustune_yaz = new OleDbCommand("UPDATE [Sheet6$] SET [Kategori]='OK' WHERE [Sira]='" + rdr["Sira"] + "'  ", baglanti);
                                komut_ustune_yaz.ExecuteNonQuery();
                            }
                            else if (tarih2_baslangic >= tarih1_baslangic && tarih2_baslangic <= tarih1_bitis)
                            {
                                if (rdr["Kategori"].ToString() == "OK")
                                {

                                }
                                else
                                {
                                    OleDbCommand komut_ustune_yaz = new OleDbCommand("UPDATE [Sheet6$] SET [Kategori]='OK' WHERE [Sira]='" + rdr_ci["Sira"] + "'  ", baglanti);
                                    komut_ustune_yaz.ExecuteNonQuery();
                                }
                            }
                        }
                    }
                }
                
                rdr_ci.Close();
 
            }
         
        }
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