You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version  3 . 5 .
You create a Microsoft Windows Communication Foundation (WCF) service that exposes the following service contract. (Line numbers are included for reference only.) 
 01  [ServiceContract] 
 02  public interface IBlogService 
 03  { 
 04  [OperationContract] 
 05  [WebGet(ResponseFormat=WebMessageFormat.Xml)] 
 06  Rss20FeedFormatter GetBlog(); 
 07  } 
You configure the WCF service to use the WebHttpBinding class, and to be exposed at the following URL:
http://www.contoso.com/BlogService 
You need to store the result of the GetBlog operation in an XmlDocument variable named xmlBlog in a Web form.
Which code segment should you use?

Answers:
A:
string url = @"http: //www.contoso.com/BlogService/GetBlog"; 
XmlReader blogReader = XmlReader.Create(url); 
xmlBlog.Load(blogReader);

B:
string url = @"http: //www.contoso.com/BlogService"; 
XmlReader blogReader = XmlReader.Create(url); 
xmlBlog.Load(blogReader);

C:
Uri blogUri = new Uri(@"http: //www.contoso.com/BlogService"); 
ChannelFactory<IBlogService> blogFactory = new ChannelFactory<IBlogService>(blogUri); 
IBlogService blogSrv = blogFactory.CreateChannel(); 
Rss20FeedFormatter feed = blogSrv.GetBlog(); 
xmlBlog.LoadXml(feed.ToString());

D:
Uri blogUri = new Uri(@"http: //www.contoso.com/BlogService/GetBlog"); 
ChannelFactory<IBlogService> blogFactory = new ChannelFactory<IBlogService>(blogUri); 
IBlogService blogSrv = blogFactory.CreateChannel(); 
Rss20FeedFormatter feed = blogSrv.GetBlog(); 
xmlBlog.LoadXml(feed.Feed.ToString());

XmlReader blogReader = XmlReader.Create(url);