WCF宿主与服务托管

namespace BruceZhang.WCF.DocumentsExplorerServiceContract 
{ 
[ServiceContract] 
public interface IDocumentsExplorerService 
{ 
[OperationContract] 
[FaultContract(typeof(DirectoryNotFoundException))] 
DocumentList FetchDocuments(string homeDir); 

[OperationContract] 
Stream TransferDocument(Document document); 
} 
} 

namespace BruceZhang.WCF.DocumentsExplorerServiceImplementation 
{ 
[ServiceBehavior(InstanceContextMode=InstanceContextMode.Single)] 
public class DocumentsExplorerService : IDocumentsExplorerService 
{ 
#region IDocumentsExplorerService Members 

public DocumentList FetchDocuments(string homeDir) 
{ 
//implementation code 
} 

public Stream TransferDocument(Document document) 
{ 
//implementation code 
} 

#endregion 
} 
}