static OrderCollection InitialOrder()
{
OrderCollection collection = new OrderCollection();
collection.Add(new Order {
CodeID = "1", Country = "USA", Date = DateTime.Now, Name = "Trump"
});
collection.Add(new Order {
CodeID = "2", Country = "China", Date = DateTime.Now, Name = "Xi"
});
return(collection);
}
static void Main(string[] args)
{
OrderCollection collection = InitialOrder();
var result = collection.WhereNew(o => o.Country.Contains("U"));
foreach (Order item in result)
{
Console.WriteLine("CodeID:" + item.CodeID + " Country:" + item.Country + " Date:" + item.Date + " Name:" + item.Name);
}
collection.Add(new Order {
CodeID = "3", Country = "UK", Date = DateTime.Now, Name = "Elizabeth"
});
Console.WriteLine("========================================================");
foreach (Order item in result)
{
Console.WriteLine("CodeID:" + item.CodeID + " Country:" + item.Country + " Date:" + item.Date + " Name:" + item.Name);
}
Console.ReadLine();
}
public OrderEnumerator(OrderCollection collection)
{
this.collection = collection;
}