private void aintenanceBtn_Click(object sender, EventArgs e)
        {
            this.Hide();
            Pool_Maintenance_List poolMainList = new Pool_Maintenance_List();

            poolMainList.Show();
        }
 private void pictureBox2_Click(object sender, EventArgs e)
 {
     if (labelUser.Text == "Admin")
     {
         this.Hide();
         Pool_Maintenance_List poolMainList = new Pool_Maintenance_List();
         poolMainList.Show();
     }
 }