wcf - Read For Learn

WCFTestClient The HTTP request is unauthorized with client authentication scheme ‘Anonymous’

I didn’t have control over the security configuration for the service I was calling into, but got the same error. I was able to fix my client as follows. In the config, set up the security mode:<security mode=”TransportCredentialOnly”> <transport clientCredentialType=”Windows” proxyCredentialType=”None” realm=”” /> <message clientCredentialType=”UserName” algorithmSuite=”Default” /> </security> In the code, set the proxy class … Read more

Collection was modified; enumeration operation may not execute

What’s likely happening is that SignalData is indirectly changing the subscribers dictionary under the hood during the loop and leading to that message. You can verify this by changing To If I’m right, the problem will disappear. Calling subscribers.Values.ToList() copies the values of subscribers.Values to a separate list at the start of the foreach. Nothing else has access to this list (it … Read more

The HTTP request was forbidden with client authentication scheme ‘Anonymous’. The remote server returned an error: (403) Forbidden

Another reason for this is the certificate itself on the server you are hitting. Ensure you have imported the PRIVATE KEY. In MMC this will show up with a “Friendly Name”. This took me days to figure out. Once I imported the private key the Anonymous error went away and all was well!

WCF vs ASP.NET Web API

The new ASP.NET Web API is a continuation of the previous WCF Web API project (although some of the concepts have changed). WCF was originally created to enable SOAP-based services. For simpler RESTful or RPCish services (think clients like jQuery) ASP.NET Web API should be good choice.

What is WCF? and what can it do?

@acidzombie24, to counter your comment to Ryan’s answer: WCF is NOT a remote function call – not at all. Quite the contrary! WCF is a message based communication system – your clients will have a proxy that has the same method as the server. When you call such a function on the client proxy, what the WCF runtime does … Read more

What is w3wp.exe?

An Internet Information Services (IIS) worker process is a windows process (w3wp.exe) which runs Web applications, and is responsible for handling requests sent to a Web Server for a specific application pool. It is the worker process for IIS. Each application pool creates at least one instance of w3wp.exe and that is what actually processes requests in … Read more

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