The given key was not present in the dictionary. Accessing WCF in Silverlight project

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ASP.NET

WCF

Silverlight

Hi,

I am trying to create a new WCF project and then I want to add reference of it to a new Silverlight Project in VS 2010 (4.0). But when I call the WCF Service by adding the reference, it displayes "The given key was not present in the dictionary." error on running the project.

Code on Silverlight project to access the WCF service:

WebNewsService.Service1Client objWebNewsService = new WebNewsService.Service1Client();
            objWebNewsService.GetLatestNewsCompleted += new EventHandler<WebNewsService.GetLatestNewsCompletedEventArgs>(objWebNewsService_GetLatestNewsCompleted);

I have tried to search on net for this but couldn't find any suitable answer.

I also have noticed that WCF project hasn't generated Disco file. But Interface is provided with all the methods in the WCF. All the methods return the correct values.

Can Anyone help me regarding this?

Also if anyone can give me accurate examples of usage of WCF in Silverlight project.

Thanks
Ashish