Added deprecation notice to all pages in wcf docs (#22549)

Author: asanyaga

docs/framework/data/wcf/accessing-data-service-resources-wcf-data-services.md

@@ -11,6 +11,8 @@ ms.assetid: 9665ff5b-3e3a-495d-bf83-d531d5d060ed
 ---
 # Accessing Data Service Resources (WCF Data Services)
 
+[!INCLUDE [wcf-deprecated](~/includes/wcf-deprecated.md)]
+
 WCF Data Services supports the Open Data Protocol (OData) to expose your data as a feed with resources that are addressable by URIs. These resources are represented according to the entity-relationship conventions of the [Entity Data Model](../adonet/entity-data-model.md). In this model, entities represent operational units of data that are data types in an application domain, such as customers, orders, items, and products. Entity data is accessed and changed by using the semantics of representational state transfer (REST), specifically the standard HTTP verbs of GET, PUT, POST, and DELETE.  
 
 ## Addressing Resources  

docs/framework/data/wcf/accessing-the-service-from-a-web-browser-wcf-data-services-quickstart.md

@@ -6,6 +6,8 @@ ms.assetid: 5a6fa180-3094-4e6e-ba2b-8c80975d18d1
 ---
 # Accessing the Service from a Web Browser (WCF Data Services Quickstart)
 
+[!INCLUDE [wcf-deprecated](~/includes/wcf-deprecated.md)]
+
 This is the second task of the WCF Data Services quickstart. In this task, you start the WCF Data Services from Visual Studio and optionally disable feed reading in the Web browser. You then retrieve the service definition document as well as access data service resources by submitting HTTP GET requests through a Web browser to the exposed resources.
 
 > [!NOTE]

docs/framework/data/wcf/application-scenarios-wcf-data-services.md

@@ -9,6 +9,8 @@ ms.assetid: 7c82658f-e7c0-46b6-834d-6592f67ab5ea
 
 # Application Scenarios (WCF Data Services)
 
+[!INCLUDE [wcf-deprecated](~/includes/wcf-deprecated.md)]
+
 WCF Data Services supports a core set of scenarios for exposing and consuming data as Open Data Protocol (OData) feeds. This topic points you to the topics relevant to these scenarios.
 
 Expose relational data from a database as an OData feed.

docs/framework/data/wcf/asynchronous-operations-wcf-data-services.md

@@ -9,6 +9,8 @@ ms.assetid: 679644c7-e3fc-422c-b14a-b44b683900d0
 ---
 # Asynchronous Operations (WCF Data Services)
 
+[!INCLUDE [wcf-deprecated](~/includes/wcf-deprecated.md)]
+
 Web applications must accommodate higher latency between client and server than applications that run inside internal networks. To optimize the performance and user experience of your application, we recommend using the asynchronous methods of the <xref:System.Data.Services.Client.DataServiceContext> and <xref:System.Data.Services.Client.DataServiceQuery%601> classes when accessing WCF Data Services servers over the Web.  
 
  Although the WCF Data Services servers process HTTP requests asynchronously, some methods of the WCF Data Services client libraries are synchronous and wait until the entire request-response exchange is completed before continuing execution. The asynchronous methods of the WCF Data Services client libraries do not wait for this exchange to complete and can allow your application to maintain a responsive user interface in the meantime.  

docs/framework/data/wcf/attach-an-existing-entity-to-dc-wcf-data.md

@@ -10,6 +10,8 @@ ms.assetid: e3f2d71d-434c-4e98-91c3-95adae4702b6
 ---
 # How to: Attach an Existing Entity to the DataServiceContext (WCF Data Services)
 
+[!INCLUDE [wcf-deprecated](~/includes/wcf-deprecated.md)]
+
 When an entity already exists in a data service, the WCF Data Services client library enables you to attach an object that represents the entity directly to the <xref:System.Data.Services.Client.DataServiceContext> without first executing a query. For more information, see [Updating the Data Service](updating-the-data-service-wcf-data-services.md).  
 
  The example in this topic uses the Northwind sample data service and autogenerated client data service classes. This service and the client data classes are created when you complete the [WCF Data Services quickstart](quickstart-wcf-data-services.md).  

docs/framework/data/wcf/batching-operations-wcf-data-services.md

@@ -7,6 +7,8 @@ ms.assetid: 962a49d1-cc11-4b96-bc7d-071dd6607d6c
 ---
 # Batching Operations (WCF Data Services)
 
+[!INCLUDE [wcf-deprecated](~/includes/wcf-deprecated.md)]
+
 The Open Data Protocol (OData) supports batch processing of requests to an OData-based service. For more information, see [OData: Batch Processing](https://www.odata.org/documentation/odata-version-2-0/batch-processing/). In WCF Data Services, each operation that uses the <xref:System.Data.Services.Client.DataServiceContext>, such as executing a query or saving changes, results in a separate request being sent to the data service. In order to maintain a logical scope for sets of operations, you can explicitly define operational batches. This ensures that all operations in the batch are sent to the data service in a single HTTP request, enables the server to process the operations atomically, and reduces the number of round trips to the data service.  
 
 ## Batching Query Operations  

docs/framework/data/wcf/bind-data-to-wpf-elements-wcf-data-services.md

@@ -11,6 +11,8 @@ ms.assetid: d6538ab0-0abe-426a-b9d9-e6f3a5ca2016
 ---
 # How to: Bind Data to Windows Presentation Foundation Elements (WCF Data Services)
 
+[!INCLUDE [wcf-deprecated](~/includes/wcf-deprecated.md)]
+
 With WCF Data Services, you can bind Windows Presentation Foundation (WPF) elements such as a <xref:System.Windows.Controls.ListBox> or <xref:System.Windows.Controls.ComboBox> to an instance of <xref:System.Data.Services.Client.DataServiceCollection%601>, which handles the events raised by the controls to keep the <xref:System.Data.Services.Client.DataServiceContext> synchronized with changes made to data in the controls. For more information, see [Binding Data to Controls](binding-data-to-controls-wcf-data-services.md).  
 
  The example in this topic uses the Northwind sample data service and autogenerated client data service classes. This service and the client data classes are created when you complete the [WCF Data Services quickstart](quickstart-wcf-data-services.md).  

docs/framework/data/wcf/binding-data-to-controls-wcf-data-services.md

@@ -12,6 +12,8 @@ ms.assetid: b32e1d49-c214-4cb1-867e-88fbb3d08c8d
 ---
 # Binding Data to Controls (WCF Data Services)
 
+[!INCLUDE [wcf-deprecated](~/includes/wcf-deprecated.md)]
+
 With WCF Data Services, you can bind controls such as the `ComboBox` and `ListView` controls to an instance of the <xref:System.Data.Services.Client.DataServiceCollection%601> class. This collection, which inherits from the <xref:System.Collections.ObjectModel.ObservableCollection%601> class, contains the data from an Open Data Protocol (OData) feed. This class represents a dynamic data collection that provides notifications when items get added or removed. When you use an instance of <xref:System.Data.Services.Client.DataServiceCollection%601> for data binding, the WCF Data Services client libraries handle these events to ensure that objects tracked by the <xref:System.Data.Services.Client.DataServiceContext> remain synchronized with the data in the bound UI element.  
 
  The <xref:System.Data.Services.Client.DataServiceCollection%601> class (indirectly) implements the <xref:System.Collections.Specialized.INotifyCollectionChanged> interface to alert the context when objects are added to or removed from the collection. Data service type objects used with a <xref:System.Data.Services.Client.DataServiceCollection%601> must also implement the <xref:System.ComponentModel.INotifyPropertyChanged> interface to alert the <xref:System.Data.Services.Client.DataServiceCollection%601> when properties of objects in the binding collection have changed.  

docs/framework/data/wcf/calling-service-operations-wcf-data-services.md

@@ -8,6 +8,8 @@ ms.assetid: 1767f3a7-29d2-4834-a763-7d169693fa8b
 ---
 # Calling Service Operations (WCF Data Services)
 
+[!INCLUDE [wcf-deprecated](~/includes/wcf-deprecated.md)]
+
 The Open Data Protocol (OData) defines service operations for a data service. WCF Data Services enables you to define such operations as methods on the data service. Like other data service resources, these service operations are addressed by using URIs. A service operation can return collections of entity types, single entity type instances, and primitive types, such as integer and string. A service operation can also return `null` (`Nothing` in Visual Basic). The WCF Data Services client library can be used to access service operations that support HTTP GET requests. These kinds of service operations are defined as methods that have the <xref:System.ServiceModel.Web.WebGetAttribute> applied. For more information, see [Service Operations](service-operations-wcf-data-services.md).  
 
  Service operations are exposed in the metadata returned by a data service that implements the OData. In the metadata, service operations are represented as `FunctionImport` elements. When generating the strongly typed <xref:System.Data.Services.Client.DataServiceContext>, the Add Service Reference and DataSvcUtil.exe tools ignore this element. Because of this, you will not find a method on the context that can be used to call a service operation directly. However, you can still use the WCF Data Services client to call service operations in one of these two ways:  

docs/framework/data/wcf/configuring-the-data-service-wcf-data-services.md

@@ -10,6 +10,8 @@ ms.assetid: 59efd4c8-cc7a-4800-a0a4-d3f8abe6c55c
 ---
 # Configuring the Data Service (WCF Data Services)
 
+[!INCLUDE [wcf-deprecated](~/includes/wcf-deprecated.md)]
+
 With WCF Data Services, you can create data services that expose Open Data Protocol (OData) feeds. Data in these feeds can come from a variety of data sources. WCF Data Services uses data providers to expose this data as an OData feed. These providers include an Entity Framework provider, a reflection provider, and a set of custom data service provider interfaces. The provider implementation defines the data model for the service. For more information, see [Data Services Providers](data-services-providers-wcf-data-services.md).  
 
  In WCF Data Services, a data service is a class that inherits from the <xref:System.Data.Services.DataService%601> class, where the type of the data service is the entity container of the data model. This entity container has one or more properties that return an <xref:System.Linq.IQueryable%601>, which are used to access entity sets in the data model.