Force to close connection

private void Button2_Click(object sender, EventArgs e)
        {
            try
            {
                foreach (System.Diagnostics.Process process in System.Diagnostics.Process.GetProcessesByName("MSACCESS"))
                {
                    if (process.MainWindowTitle.Contains("fatih2541.accdb"))
                    {
                        process.Kill();
                    }
                }
                GC.Collect();
                   GC.WaitForPendingFinalizers();
                    OpenFileDialog dlg = new OpenFileDialog
                    {
                        Filter = "Microsoft Access Database(2002-2003) (*.mdb)|*.mdb|Microsoft Access Database(2007-2009) (*.accdb)|*.accdb",
                        // If you want to keep default extensiion *.mdb then FilterIndex = 1 or if you want to keep default extension *.accdb then FilterIndex=2
                        FilterIndex = 2,
                        InitialDirectory = Environment.CurrentDirectory + @"\Backup"};
                    if (dlg.ShowDialog() == DialogResult.OK)
                    {
                        MessageBox.Show("Database to restore " + dlg.FileName);
                    }
                    string PathToRestoreDB = Environment.CurrentDirectory + @"\fatih2541.accdb";
                string Filetorestore = dlg.FileName;    // Rename Current Database to .Bak
                    File.Move(PathToRestoreDB, PathToRestoreDB);     //Restore the Database From Backup Folder
                    File.Copy(Filetorestore, PathToRestoreDB, true);
                MessageBox.Show("It was replaced with the database backup.", "The new information has been transfered.", MessageBoxButtons.OK, MessageBoxIcon.Information); 
                
            }
            catch (Exception ex)
            {
                MessageBox.Show("The process was canceled " + ex.Message);

            }
        }