private void AddToolStripButton_Click(object sender, EventArgs e)
        {
            var id       = Convert.ToInt32(categoryToolStripComboBox.ComboBox.SelectedValue);
            var name     = categoryToolStripComboBox.ComboBox.Text;
            var category = new Category(id, name);
            var form     = new AddProductForm(category);
            var result   = form.ShowDialog();

            if (result == DialogResult.OK)
            {
                currentSource.AddProduct(productsBindingSource, form.Product);
            }
        }
        private void AddStripButton_Click(object sender, EventArgs e)
        {
            var id   = (int)CategoryToolStripComboBox.ComboBox.SelectedValue;
            var name = CategoryToolStripComboBox.Text;

            var category       = new Category(id, name);       //ca sa mearga biding-ul dintre category si data set ne generam aici obiectul
            var productFormAdd = new AddProductForm(category); //si-l adaugam in constructor

            var result = productFormAdd.ShowDialog();

            if (result == DialogResult.OK)
            {
                _currentSource.AddProduct(_productBindingSource, productFormAdd.Product);
            }
        }