' Create a SalesOrderHeader query with two query paths, 
' one that returns order items and a second that returns the 
' billing and shipping addresses for each order.
Dim query As ObjectQuery(Of SalesOrderHeader) = _
    context.SalesOrderHeader.Include("SalesOrderDetail").Include("Address")

// Create a SalesOrderHeader query with two query paths, 
// one that returns order items and a second that returns the 
// billing and shipping addresses for each order.
ObjectQuery<SalesOrderHeader> query =
    context.SalesOrderHeader.Include("SalesOrderDetail").Include("Address");

Using context As New AdventureWorksEntities
    ' Create an object query with a path that returns orders and items for a contact.
    Dim contact As Contact = _
        context.Contact.Include("SalesOrderHeader.SalesOrderDetail") _
        .FirstOrDefault()
    Try
        ' Execute the query and display information for each item 
        ' in the orders that belong to the returned contact.
        Dim order As SalesOrderHeader
        For Each order In contact.SalesOrderHeader
            Console.WriteLine(String.Format("PO Number: {0}", _
                    order.PurchaseOrderNumber))
            Console.WriteLine(String.Format("Order Date: {0}", _
                    order.OrderDate.ToString()))
            Console.WriteLine("Order items:")
            Dim item As SalesOrderDetail
            For Each item In order.SalesOrderDetail
                Console.WriteLine(String.Format("Product:{0}" _
                    + "Quantity: {1}", item.ProductID.ToString(), _
                    item.OrderQty.ToString()))
            Next
        Next
    Catch ex As EntitySqlException
        Console.WriteLine(ex.ToString())
    Catch ex As EntityCommandExecutionException
        Console.WriteLine(ex.ToString())
    End Try
End Using

using (AdventureWorksEntities context =
    new AdventureWorksEntities())
{
    // Define an object query with a path that returns 
    // orders and items for a specific contact.
    Contact contact =
        context.Contact.Include("SalesOrderHeader.SalesOrderDetail")
        .FirstOrDefault();

    try
    {
        // Execute the query and display information for each item 
        // in the orders that belong to the first contact.
        foreach (SalesOrderHeader order in contact
            .SalesOrderHeader)
        {
            Console.WriteLine(String.Format("PO Number: {0}",
                order.PurchaseOrderNumber));
            Console.WriteLine(String.Format("Order Date: {0}",
                order.OrderDate.ToString()));
            Console.WriteLine("Order items:");
            foreach (SalesOrderDetail item in order.SalesOrderDetail)
            {
                Console.WriteLine(String.Format("Product: {0} "
                    + "Quantity: {1}", item.ProductID.ToString(),
                    item.OrderQty.ToString()));
            }
        }
    }
    catch (EntitySqlException ex)
    {
        Console.WriteLine(ex.ToString());
    }
    catch (EntityCommandExecutionException ex)
    {
        Console.WriteLine(ex.ToString());
    }
}