/// <summary>
/// Display the contents of our DataTable object
/// </summary>
/// <returns></returns>
public string Display()
{
var str = String.Empty;
str += "---- Order Data ----\n";
str += OrderData.Display();
str += "---- Customer Data ----\n";
str += CustomerData.Display();
str += "---- Food Data ----\n";
str += FoodData.Display();
str += "---- OrderFood Data ----\n";
str += OrderFoodData.Display();
str += "---- OTCMeds Data ----\n";
str += OTCMedData.Display();
str += "---- OrderOTCMed Data ----\n";
str += OrderOTCMedData.Display();
str += "---- Pharmacy Data ----\n";
str += PharmacyData.Display();
str += "---- Zip code Data ----\n";
str += ZipCodeData.Display();
return(str);
}