C# 4 and .NET 4

Message Queuing with WCf ❘ 1383
The Click event handler of the buttonProcessOrder button removes the selected course order from the
collection class:
private void buttonProcessOrder_Click(object sender, RoutedEventArgs e)
{
CourseOrder courseOrder = listOrders.SelectedItem as CourseOrder;
courseOrders.Remove(courseOrder);
listOrders.SelectedIndex = -1;
buttonProcessOrder.IsEnabled = false;
}
MessageBox.Show("Course order processed", "Course Order Receiver",
MessageBoxButton.OK, MessageBoxImage.Information);
code snippet CourseOrderReceiver/CourseOrderReceiverWindow.xaml.cs
WCf message sender application
The sending application is modified to make use of a WCF proxy class. For the contract of the service,
the assembly CourseOrderServiceContract is referenced, and the assembly System.ServiceModel is
required for use of the WCF classes.
In the Click event handler of the buttonSubmit control, the ChannelFactory class returns a proxy.
The proxy sends a message to the queue by invoking the method AddCourseOrder():
private void buttonSubmit_Click(object sender, RoutedEventArgs e)
{
try
{
var order = new CourseOrder
{
Course = new Course()
{
Title = comboCourses.Text
},
Customer = new Customer()
{
Company = textCompany.Text,
Contact = textContact.Text
}
};
var factory = new ChannelFactory("queueEndpoint");
ICourseOrderService proxy = factory.CreateChannel();
proxy.AddCourseOrder(order);
factory.Close();
MessageBox.Show("Course order submitted", "Course Order",
MessageBoxButton.OK, MessageBoxImage.Information);
}
catch (Exception ex)
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