Where - Drilldown

Query
public void Linq4()
{
List customers = GetCustomerList();

var waCustomers =
from c in customers
where c.Region == "WA"
select c;

Console.WriteLine("Customers from Washington and their orders:");
foreach (var customer in waCustomers)
{
Console.WriteLine("Customer {0}: {1}", customer.CustomerID, customer.CompanyName);
foreach (var order in customer.Orders)
{
Console.WriteLine(" Order {0}: {1}", order.OrderID, order.OrderDate);
}
}
}
Lambda Expression
public void Linq4()
{
List customers = GetCustomerList();

var waCustomers = customers.Where(cust => cust.Region == "WA");

Console.WriteLine("Customers from Washington and their orders:");
foreach (var customer in waCustomers)
{
Console.WriteLine("Customer {0}: {1}", customer.CustomerID, customer.CompanyName);
foreach (var order in customer.Orders)
{
Console.WriteLine(" Order {0}: {1}", order.OrderID, order.OrderDate);
}
}
}
Output
Customers from Washington and their orders:
Customer LAZYK: Lazy K Kountry Store
Order 10482: 3/21/1997 12:00:00 AM
Order 10545: 5/22/1997 12:00:00 AM
Customer TRAIH: Trail's Head Gourmet Provisioners
Order 10574: 6/19/1997 12:00:00 AM
Order 10577: 6/23/1997 12:00:00 AM
Order 10822: 1/8/1998 12:00:00 AM
Customer WHITC: White Clover Markets
Order 10269: 7/31/1996 12:00:00 AM
Order 10344: 11/1/1996 12:00:00 AM
Order 10469: 3/10/1997 12:00:00 AM
Order 10483: 3/24/1997 12:00:00 AM
Order 10504: 4/11/1997 12:00:00 AM
Order 10596: 7/11/1997 12:00:00 AM
Order 10693: 10/6/1997 12:00:00 AM
Order 10696: 10/8/1997 12:00:00 AM
Order 10723: 10/30/1997 12:00:00 AM
Order 10740: 11/13/1997 12:00:00 AM
Order 10861: 1/30/1998 12:00:00 AM
Order 10904: 2/24/1998 12:00:00 AM
Order 11032: 4/17/1998 12:00:00 AM
Order 11066: 5/1/1998 12:00:00 AM
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