private void btnAddStock_Click(object sender, EventArgs e)
{
FrmAddStock frm = new FrmAddStock();
this.Hide();
frm.ShowDialog();
this.Visible = true;
}
private void btnBuyStock_Click(object sender, EventArgs e)
{
FrmAddStock frm = new FrmAddStock();
this.Hide();
frm.ShowDialog();
this.Visible = true;
dto = bll.Select();
dto.Products = dto.Products.Where(x => x.StockAmount <= 10).ToList();
dataGridView1.DataSource = dto.Products;
}