private void btnAdd_Click(object sender, EventArgs e)
        {
            FrmUsers frm = new FrmUsers();

            this.Hide();
            frm.ShowDialog();
            this.Visible = true;
        }
 private void btnUpdate_Click(object sender, EventArgs e)
 {
     if (detail.UserNumer == 0)
     {
         MessageBox.Show("Select a empote from the table");
     }
     else
     {
         FrmUsers frm = new FrmUsers();
         frm.detail   = detail;
         frm.isUpdate = true;
         this.Hide();
         frm.ShowDialog();
         this.Visible             = true;
         bll                      = new EmployeeBLL();
         dto                      = bll.Select();
         dataGridView1.DataSource = dto.Employees;
         CleanAll();
     }
 }