Error to register Unity in DependencyResolver

Question

Error: The type Unity.WebApi.UnityDependencyResolver does not appear to implement Microsoft.Practices.ServiceLocation.IServiceLocator. I saw this question WebApi.UnityDependencyResolver does not implement Microsoft.Practices.ServiceLocation.IServiceLocator. Parameter : commonServiceLocator but my error is in this line: ``` DependencyResolver.SetResolver(new UnityDependencyResolver(container)); ``` the complete class: ``` public static class Bootstrapper { public static void Initialise() { var container = BuildUnityContainer(); DependencyResolver.SetResolver(new UnityDependencyResolver(container)); // <-- error GlobalConfiguration.Configuration.DependencyResolver = new Unity.WebApi.UnityDependencyResolver(container); } private static IUnityContainer BuildUnityContainer() { var container = new UnityContainer(); container.RegisterType<IAutenticacionDbContext, AutenticacionDbContext>(); return container; } } ``` Note: With this I get the same error: ``` var container = BuildUnityContainer…

Accepted Answer

ASP.Net MVC and Web.API are using two different dependency resolver infrastructure.

Your problem is that you try to use the `Unity.WebApi.UnityDependencyResolver` also for the MVC controllers. To setup unity correctly follow the instructions below:

To make Unity work with MVC controllers the ones which derives from `Controller`

- install the Unity.Mvc3 nuget package

setup the dependecy reolver with using `DependencyResolver.SetResolver`:

```
DependencyResolver.SetResolver(
    new Unity.Mvc3.UnityDependencyResolver(container));
```

To make Unity work with the Web.API controllers the ones which derives form `ApiController`

- install the Unity.WebAPi nuget package

set the dependency resolver with using `GlobalConfiguration.Configuration`:

```
GlobalConfiguration.Configuration.DependencyResolver = 
    new Unity.WebApi.UnityDependencyResolver(container);
```

Error to register Unity in DependencyResolver

Solution

Problem