diff --git a/microsoft-ajax/microsoft.ajax.d.ts b/microsoft-ajax/microsoft.ajax.d.ts
index d1bb1098b..abeb345bd 100644
--- a/microsoft-ajax/microsoft.ajax.d.ts
+++ b/microsoft-ajax/microsoft.ajax.d.ts
@@ -1654,6 +1654,7 @@ declare module Sys {
 
         /**
         * Provides the script API to make a Web request.
+        * @see {@link http://msdn.microsoft.com/en-us/library/bb310979(v=vs.100).aspx}
         */
         class WebRequest {
 
@@ -1701,6 +1702,117 @@ declare module Sys {
             //#endregion
 
         }
+
+        /**
+        * Provides the abstract base class from which network executors derive.
+        * @see {@link http://msdn.microsoft.com/en-us/library/bb397434(v=vs.100).aspx}
+        */
+        class WebRequestExecutor {
+
+            //#region Constructors
+
+            /**
+            * Initializes a Sys.Net.WebRequestExecutor instance when implemented in a derived class.
+            */
+            constructor();
+
+            //#endregion
+
+            //#region Methods
+
+            /**
+            * Stops the pending network request issued by the executor.
+            * The specifics of aborting a request vary depending on how an executor is implemented. 
+            * However, all executors that derive from WebRequestExecutor must set their state to aborted and must raise the completed event of the associated Sys.Net.WebRequest object.
+            * The executor properties do not contain consistent data after abort has been called.
+            */
+            abort(): void;
+            /**
+            * Instructs the executor to execute a Web request.  
+            * When this method is called, the executor packages the content of the Web request instance and initiates processing.
+            * This method is intended to be used by a custom executor. If you are implementing a custom executor, you instantiate the executor, assign it to the Web request instance, and then invoke the method on the executor instance.
+            * @see {@link http://msdn.microsoft.com/en-us/library/bb383834(v=vs.100).aspx}
+            */
+            executeRequest(): void;
+            /**
+            * Gets all the response headers for the current request.
+            * If a request finished successfully and with valid response data, this method returns all the response headers.  
+            * @return All the response headers
+            * @see {@link http://msdn.microsoft.com/en-us/library/bb310805(v=vs.100).aspx}
+            */ 
+            getAllResponseHeaders(): string;
+            /**
+            * Gets the value of the specified response header.
+            * @return The specified response header.
+            */
+            getResponseHeader(): string;
+
+            //#endregion
+
+            //#region Properties
+
+            /**
+            * Gets the JSON-evaluated object from the response.
+            * @return The JSON-evaluated response object.
+            */
+            object(): any;
+            /**
+            * Gets a value indicating whether the request associated with the executor was aborted.  
+            * When the current instance of the Sys.Net.WebRequestExecutor class is aborted, it must set its state to aborted and it must raise the completed event of the associated request object.
+            * @return true if the request associated with the executor was aborted; otherwise, false.
+            */
+            get_aborted(): boolean;
+            /**
+            * Gets a value indicating whether the request completed successfully.  
+            * Successful completion usually means a well-formed response was received by the executor. 
+            * If a response was received, the current instance of the Sys.Net.WebRequestExecutor class must set its state to completed. 
+            * It must also raise the completed event of the associated request object.
+            * @return true if the request completed successfully; otherwise, false.
+            */
+            get_responseAvailable(): boolean;
+            /**
+            * Gets the text representation of the response body. When a request has completed successfully with valid response data, this property returns the text that is contained in the response body. 
+            * @return The text representation of the response body.
+            */
+            get_responseData(): string;
+            /**
+            * Returns a value indicating whether the executor has started processing the request.
+            * The executor returns true if substantial processing of the request has started. For executors that make network calls, substantial processing means that a network call has been started.
+            * @return true if the executor has started processing the request; otherwise, false.
+            */
+            get_started(): boolean;
+            /**
+            * Gets a success status code.
+            * The statusCode property returns an integer that specifies that a request completed successfully and with valid response data.
+            * @return An integer that represents a status code.
+            */
+            get_statusCode(): number;
+            /**
+            * Gets status information about a request that completed successfully.   
+            * The statusText property returns status information if a request completed successfully and with valid response data.
+            * @return the status text
+            */
+            get_statusText(): string;
+            /**
+            * Gets a value indicating whether the request timed out.
+            * Executors use the time-out information associated with the request to raise the completed event on the associated WebRequest object.
+            * @return true if the request timed out; otherwise, false. 
+            */
+            get_timedOut(): boolean;
+            /**
+            * Attempts to get the response to the current request as an XMLDOM object.
+            * If a request finished successfully with valid response data, this method tries to get the response as an XMLDOM object.  
+            */
+            get_xml(): XMLDocument;
+            /**
+            * Gets the WebRequest object associated with the executor.   
+            * @return The WebRequest object associated with the current executor instance.
+            */
+            get_webRequest(): Sys.Net.WebRequest;
+
+            //#endregion
+        }
+
     }
 
     //#endregion