Retrieve file path from Database and Save in other Directory in Windows Application using C# and VB.Net

Hi! I want get path from database and save file in other directory.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

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

        private void Choose_Click(object sender, EventArgs e)
        {
            string saveDirectory = @"D:\File\";
            using (OpenFileDialog openFileDialog1 = new OpenFileDialog())
            {
                if (openFileDialog1.ShowDialog() == DialogResult.OK)
                {
                    if (!Directory.Exists(saveDirectory))
                    {
                        Directory.CreateDirectory(saveDirectory);
                    }
                    filepath.filename = Path.GetFileName(openFileDialog1.FileName);
                    filepath.fileSavePath = Path.Combine(saveDirectory, filepath.filename);
                    File.Copy(openFileDialog1.FileName, filepath.fileSavePath, true);
                    //insert the file into database
                    string constr = @"Data Source=localhost;Database=dbFiles; uid=sa; pwd=d-123";
                    SqlConnection conn = new SqlConnection(constr);
                    string strQuery = "insert into tblFilesPath(Name, Path) values (@Name, @Path)";
                    SqlCommand cmd = new SqlCommand(strQuery, conn);
                    cmd.Parameters.Add("@Name", SqlDbType.VarChar).Value = filepath.filename;
                    cmd.Parameters.Add("@Path", SqlDbType.NVarChar).Value = filepath.fileSavePath;
                    conn.Open();
                    cmd.ExecuteNonQuery();
                    conn.Close();
                }
            }
        }

        private void Retrieve_Click(object sender, EventArgs e)
        {
            DataTable dt = new DataTable();
            string destFile = @"D:\Folder\";
            if (!Directory.Exists(destFile))
            {
                Directory.CreateDirectory(destFile);
            }
            string constr = @"Data Source=localhost;Database=dbFiles; uid=sa; pwd=d-123";
            SqlConnection conn = new SqlConnection(constr);
            string strQuery = "select Name, Path from tblFilesPath";
            SqlCommand cmd = new SqlCommand(strQuery, conn);
            SqlDataAdapter sda = new SqlDataAdapter(cmd);
            conn.Open();
            sda.Fill(dt);
            conn.Close();
            string sourcepath = dt.Rows[0][0].ToString();
            File.Copy(sourcepath, destFile + dt.Rows[0][1].ToString(), true);
          //  MessageBox.Show(dt.Rows[0][1].ToString());
        }

        public static class filepath
        {
            public static string fileSavePath;
            public static string filename;
        }
    }
}