Cannot debug under VS2010 SP1 with IIS Express

[ericjohannsen]

When I switched my MVC 3 project to use IIS Express rather than Cassini, I can no longer debug. I can however browse to the appropriate URL on localhost and view the website without debugging.

In Application_Error(), I get

The remote host closed the connection. The error code is 0x800704CD.

There is no inner exception, and the stack is:

at System.Web.Hosting.IIS7WorkerRequest.RaiseCommunicationError(Int32 result, Boolean throwOnDisconnect)
at System.Web.Hosting.IIS7WorkerRequest.ExplicitFlush()
at System.Web.HttpResponse.Flush(Boolean finalFlush)
at System.Web.HttpResponse.Flush()
at Rejuicer.RejuicerModule.context_BeginRequest(Object sender, EventArgs e)
at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Changing

to

resolves the issue.

Note though that there is no issue either way debugging under Cassini.