Troubleshoot locking issues while calling multiple methods in a WCF service from Silverlight

Question

I just read this interesting article about calling multiple methods in a WCF service from Silverlight at the same time:

http://weblogs.asp.net/olakarlsson/archive/2010/05/20/simultaneously-calling-multiple-methods-on-a-wcf-service-from-silverlight.aspx

The article says: “It turns out that the problem is based on a combination of Silverlight, Asp.Net and WCF, basically, if you make several calls to the single WCF web service , and you have the Asp.Net session state enabled, calls will be made sequentially by the service, therefore any long calls will block subsequent ones. "

I assume that blocking is a problem only if you make several calls to the same service , and that two simultaneous calls to two different methods for two different services should not lead to one blocking of the other?

A suggested solution to the problem in SL3 involves using the following syntax in the Application_Startup method:

WebRequest.RegisterPrefix ("http: //", WebRequestCreator.ClientHttp);

Then, session state should be maintained in WCF calls by setting up a cookie container and passing it to all your proxies (see http://forums.silverlight.net/forums/p/174322/393032.aspx )

Is this another recommended solution in Silverlight 4? Has anyone used an alternative approach?

Answer 1

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Answer 2

.NET 4 Application_BeginRequest

if (Context.Request.Path.EndsWith("xxx.svc"))
   Context.SetSessionStateBehavior(SessionStateBehavior.Disabled);