private void tsbAddCategory_Click(object sender, EventArgs e)
        {
            forFun = 1;
            AddCategoryForm acf = new AddCategoryForm();

            acf.Show();
        }
 private void tsbUpdateCategory_Click(object sender, EventArgs e)
 {
     if (getCatId != "")
     {
         forFun = 2;
         AddCategoryForm acf = new AddCategoryForm();
         acf.Show();
     }
     else
     {
         MessageBox.Show("Please select a product");
     }
 }