private void btnAddnewCategory_Click(object sender, EventArgs e)
{
AddFoodCategory addFoodCategories = AddFoodCategory.getInstance();
addFoodCategories.Show();
this.Hide();
}
private void btnEdit_Click(object sender, EventArgs e)
{
//getting the card id
String cardId = this.txtCardID.Text;
AddFoodCategory addFoodcategory = AddFoodCategory.getInstance();
addFoodcategory.editcategory(cardId);
addFoodcategory.Show();
this.Hide();
}