Software Engineering, Security, Management & Leadership. I work for Microsoft as an Application Development Manager (ADM). Views are mine.


Windows 10 WCF issues with HTTP statuses 400.3 or 500.19

21st November 2016

I've been working with the awesome Xamarin.Forms recently which was working just fine. I then needed to deploy a WCF service into my local IIS (my usual preference to IIS Express) for some testing. The virtual directory was created fine by Visual Studio, but I could not access the .SVC page.

It took a few minutes of deep thought to consider what was happening. It was a fairly new Windows 10 machine that had IIS installed, but, Windows is now very locked own out-of-the-box, so I realised that it still didn't have the features needed to activate a WCF service!

This manifested itself firstly in a HTTP 500.19 error (which usually means a web.config error) and secondly HTTP 400.3(invalid header).

If you open Programs and Features and then Add/Remove Windows features you can add WCF Activation and the WCF services you require. I also ran aspnet_Regiis.exe -i to be sure that my .NET versions were all correctly registered for use by IIS.

Once I installed the Windows features, everything started working fine. Hope this helps!

Software Engineer with interests in security and business processes.

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