public void AddQuantity(string modelno, int code, int quantity)
{
myShop.ProductDeserialize(ref myShop);
dgvData.DataSource = myShop.ProductList;
bool result = myShop.AddExistingProduct(modelno, code, quantity);
if (result)
{
MessageBox.Show(Filepath.QuantityAdded);
myShop.ProductSerialize(ref myShop);
Reset();
}
else
{
MessageBox.Show("Enter valid ModelNo and the corresponding code");
txtCode.Clear();
txtModel.Clear();
}
}