// save the data just before the form closes
private void frmProducts_FormClosing(object sender, FormClosingEventArgs e)
{
ProductDB.SaveProducts(products);
}
// read product from the file and display
private void frmProducts_Load(object sender, EventArgs e)
{
products = ProductDB.ReadProducts();
DisplayProducts();
}
private void btnSave_Click(object sender, EventArgs e)
{
ProductDB.SaveProducts(products);
}