System.Net.WebException: Unable to connect to the remote server —> System.Net.Sockets.SocketException: No connection could be made because the target machine actively refused it

If you have this error when calling SaveChanges method in WCF Data Services then most likely you will have the same problem as I did.

By default Visual Studio will generate this:

public class BeancurdDataService : DataService< /* TODO: put your data source class name here */ >


   // This method is called only once to initialize service-wide policies.

   public static void InitializeService(DataServiceConfiguration config)


   // TODO: set rules to indicate which entity sets and service operations are visible, updatable, etc.

   // Examples:

   // config.SetEntitySetAccessRule("MyEntityset", EntitySetRights.AllRead);

   // config.SetServiceOperationAccessRule("MyServiceOperation", ServiceOperationRights.All);

   config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V2;



More of the video or tutorial will ask you to change /* TODO: put your data source class name here */ to an entity for example your entity named BeancyrdEntities then it will be:

public class BeancurdDataService : DataService<BeancurdEntities>


Then change unremarked the SetEntitySetAccessRule and replace MyEntityset to * like:

config.SetEntitySetAccessRule("*", EntitySetRights.AllRead);


This is where your nightmare started. In order to be able to write back to the Database without the error you need to do:

config.SetEntitySetAccessRule("*", EntitySetRights.All);


Try it!!!

Download the complete code from The sample file name is ADODSBeancurd.rar. My MSN ID is

About chanmingman

Since March 2011 Microsoft Live Spaces migrated to Wordpress ( till now, I have is over 1 million viewers. This blog is about more than 50% telling you how to resolve error messages, especial for Microsoft products. The blog also has a lot of guidance teaching you how to get stated certain Microsoft technologies. The blog also uses as a help to keep my memory. The blog is never meant to give people consulting services or silver bullet solutions. It is a contribution to the community. Thanks for your support over the years. Ming Man is Microsoft MVP since year 2006. He is a software development manager for a multinational company. With 25 years of experience in the IT field, he has developed system using Clipper, COBOL, VB5, VB6, VB.NET, Java and C #. He has been using Visual Studio (.NET) since the Beta back in year 2000. He and the team have developed many projects using .NET platform such as SCM, and HR based applications. He is familiar with the N-Tier design of business application and is also an expert with database experience in MS SQL, Oracle and AS 400.
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