Asp.net Web API returns non-descriptive error 500

Question

In my setup I get error 500 if anything goes wrong with my Web API request.

For instance with this simple code.

public IQueryable<Article> Get(){     throw new Exception("error");     return db.Articles; //yeah i know.. unreachable, not the point } 

What I expect(and what happens in a regular MVC controller):

What I get (in Web API):

My web config:

<customErrors mode="Off"/> <compilation debug="true" targetFramework="4.5">  //under webserver <httpErrors errorMode="detailed"/> 

The app pool is running 4.0 in integrated mode. 32-bit applications are enabled.

How can I get the error to surface in the browser? Or at the very least during debugging?

Answer 1

Had the same problem.

For me adding the

    GlobalConfiguration.Configuration.IncludeErrorDetailPolicy = IncludeErrorDetailPolicy.Always; 

in the WebApiConfig Register method helped.

After that I got nice detailed info about the error.

Here is some more info on MSDN