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// For complete examples and data files, please go to https://github.com/groupdocsassembly/GroupDocs_Assembly_NET
/// <summary>
/// This function initializes/populates the data. 
/// Initialize Customer information, product information and order information
/// </summary>
/// <returns>Returns customer's complete information</returns>
public static IEnumerable<BusinessObjects.Customer> PopulateData()
{
    BusinessObjects.Customer customer = new BusinessObjects.Customer { CustomerName = "Atir Tahir", CustomerContactNumber = "+9211874", ShippingAddress = "Flat # 1, Kiyani Plaza ISB", Barcode = "123456789qwertyu0025" };
    customer.Order = new BusinessObjects.Order[]
    {
          new BusinessObjects.Order { Product = new BusinessObjects.Product { ProductName ="Lumia 525" }, Customer = customer, Price= 170, ProductQuantity = 5, OrderDate = new DateTime(2015, 1, 1) }
    };
    yield return customer; //yield return statement will return one data at a time
    customer = new BusinessObjects.Customer { CustomerName = "Usman Aziz", CustomerContactNumber = "+458789", ShippingAddress = "Quette House, Park Road, ISB", Barcode = "123456789qwertyu0025" };
    customer.Order = new BusinessObjects.Order[]
    {
          new BusinessObjects.Order { Product = new BusinessObjects.Product { ProductName = "Lenovo G50" }, Customer = customer, Price = 480, ProductQuantity = 2, OrderDate = new DateTime(2015, 2, 1) },
          new BusinessObjects.Order { Product = new BusinessObjects.Product { ProductName = "Pavilion G6"}, Customer = customer, Price = 400, ProductQuantity = 1, OrderDate = new DateTime(2015, 10, 1) },
          new BusinessObjects.Order { Product = new BusinessObjects.Product { ProductName = "Nexus 5"}, Customer = customer, Price = 320, ProductQuantity = 3, OrderDate = new DateTime(2015, 6, 1) }
    };
    yield return customer; //yield return statement will return one data at a time 
}